Michigan fault line map - Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.

 
Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.. Is makenzie thomas still married

The Michigan Geological Survey's GIS website hosts interactive maps of the surface and bedrock geology of Michigan. The geological maps can be overlain on street, topographic or aerial photographic maps. Map depicting the extent of the Ramapo Fault System in New York, New Jersey, and Pennsylvania. The Ramapo Fault zone is a system of faults between the northern Appalachian Mountains and Piedmont areas to the east. Spanning more than 185 miles (298 km) in New York, New Jersey, and Pennsylvania, it is perhaps the best known fault zone in the Mid-Atlantic region, and some small earthquakes have ...Faultline digitized from available Valley Fault System (VFS): Metro Manila and Vicinity available at PHIVOLCS website.All content is for informational use only. ... West Valley Fault Line Proximity Map for MANILA WATER Company: description: type: Web Mapping Application: tags: west valley fault,metro manila,earthquake: thumbnail: id ...Am I correct in saying we are on a major fault line. I just google fault lines and found this: US Nuclear Reactors vs Fault Line Map: This Map Shows Where Earthquakes Could Result in Nuclear Nuke… It looks like indy is pretty close to an edge. Snorko is a heck of a lot closer. I just heard 42 […]The New Madrid seismic zone has been the source of multiple major (M ~7.0–7.5) earthquakes in the past 2 ka, yet the surface expression of recent deformation remains ambiguous.These reddish rocks are Jacobsville Sandstone (1). They can be found in many places to the south of the Keweenaw Fault. Looking upstream, there are two types of rock present. You can see both basalt (also called diabase) and conglomerate. Basalt (2) is a dark rock, originating from lava flow, and is very hard.Bosch dishwashers are known for their reliability and performance, but like any appliance, they can experience faults from time to time. Fortunately, many of the most common Bosch ...The U.S. fault map will show you faults. Keep in mind that most hazardous areas face danger from more than one fault, and the most dangerous fault is not necessarily the closest. ... Bottom line: High earthquake hazard does not mean high risk. Also, while you can't change the underlying earthquake hazard, you can reduce earthquake risk by ...The National Pipeline Mapping System (NPMS) Public Viewer from the Pipeline and Hazardous Materials Safety Administration allows users to view pipelines and related information by individual county for the entire United States. The map includes: Gas and hazardous liquid pipelines Liquefied natural gas (LNG) plants Breakout tanks (tanks …The Coldwater Daily-Reporter reports that the Branch County seat is home to the state's most intense quake in recorded history. That Coldwater quake, likey from the same fault line as the 2015 …World Decorator Wall Map. $16.95. Description : World Map showing the tectonic plates of the earth represented by the fault lines. The World Fault Line Map shows the major fault lines across the globe. The earth is constantly moving because of which there is a continuous movement of the rocks. This movement of the rocks creates fractures or ...Michigan is not immune to earthquakes, although it is not in a highly seismic area. The state is home to the Michiana fault zone, which runs from southern Michigan into northern Indiana.The East African Rift System (EARS) is one of the geologic wonders of the world, a place where the earth's tectonic forces are presently trying to create new plates by splitting apart old ones. In simple terms, a rift can be thought of as a fracture in the earth's surface that widens over time, or more technically, as an elongate basin bounded ...Michigan, United States has had: (M1.5 or greater) 0 earthquakes in the past 24 hours. 0 earthquakes in the past 7 days. 1 earthquake in the past 30 days. 5 earthquakes in the past 365 days.Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.This isn’t a popularity contest™. It will take 270 electoral votes to win the 2024 presidential election. Click states on this interactive map to create your own 2024 election forecast. Create a specific match-up by clicking the party and/or names near the electoral vote counter. Use the buttons below the map to share your forecast or embed ...Map of landslides triggered by the January 12, 2010, Haiti earthquake. The magnitude (M) 7.0 Haiti earthquake of January 12, 2010, triggered landslides throughout much of Haiti on the island of Hispaniola in the Caribbean Sea. The epicenter of the quake was located at 18.44°N., 72.57°W. at a depth of 13 kilometers (km) approximately 25 km ...For faults in California and the rest of the United States (as well as the latest earthquakes) use the Latest Earthquakes Map: click on the "Basemaps and Overlays" icon in the upper right corner of the map. check the box for "U.S. Faults". mouse-over each fault to get a pop-up window with the name of the fault.We would like to show you a description here but the site won’t allow us.Michigan is not immune to earthquakes, although it is not in a highly seismic area. The state is home to the Michiana fault zone, which runs from southern Michigan into northern Indiana.Detailed Description. This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis). Green circles denote earthquakes that occurred prior to 1974 ...Answer and Explanation: 1. Become a Study.com member to unlock this answer! Create your account. View this answer. Wisconsin is on a fault line. This fault like is known as the Waukesha fault line. The movement of this fault line caused an earthquake in 1947 which... See full answer below.Golden, CO: Colorado Geological Survey, November 2018. are a special category of faults that disrupt the ground surface in glaciated, alpine areas. They are not interpreted to extend very deep into the crust and are probably not capable of generating earthquakes. However, they can potentially yield information on past earthquakes on nearby faults.activities. According to a seismic probability map prepared by the U.S. Coast and Geodetic Survey, Michigan lies in a region of low risk for earthquake occurrence. Though there …Esri, HERE, Garmin, FAO, NOAA, USGS, EPA | California Geological Survey, C.W. Jennings, W.A. Bryant |Explore the interactive map of Quaternary faults and folds in the U.S. that cause significant earthquakes, based on USGS data.Am I correct in saying we are on a major fault line. I just google fault lines and found this: US Nuclear Reactors vs Fault Line Map: This Map Shows Where Earthquakes Could Result in Nuclear Nuke… It looks like indy is pretty close to an edge. Snorko is a heck of a lot closer. I just heard 42 […]An online map of faults (Quaternary Fault and Fold Database of the United States) that includes California is in the Faults section of the Earthquake Hazards Program website. Choose the Interactive Fault Map, or download KML files and GIS shapefiles from the links on the page. USGS hazard maps, data, and tools for California and other parts of the United States are in the Seismic Hazard Maps ...Hundreds of residential, commercial, and industrial structures in the Houston metropolitan area have sustained moderate to severe damage owing to their locations on or near active faults. Paved roads have been offset by faults at hundreds of locations, butted pipelines have been distorted by fault movements, and fault-induced gradient changes in drainage lines have raised concern among flood contrDetailed Description. This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis). Green circles denote earthquakes that occurred prior to 1974 ...In today’s modern world, communication plays a vital role in both personal and professional lives. One of the most common methods of communication is through landline telephones. W...Map shows the area affected by a 4.8 earthquake, centered in New Jersey, on April 5, 2024. USGS. People in Baltimore, Philadelphia, New Jersey, Connecticut, Boston and other areas of the Northeast ...With more than 30 train routes throughout the United States, and some in Canada, Amtrak travels to over 500 destinations in 46 states, giving you the best views North America has to offer. Whether you want to visit big cities, small towns or places you can only see by rail, Amtrak can take you there. Amtrak National Route Map (PDF, 3MB)In a paper on seismic activity in Michigan published in 1977, geologist D. Michael Bricker listed 34 earthquakes with epicenters in the state — 30 from fault-slippage activity and four man-made ...The faults shown here are represented by simple lines which do not show how deep and large they are. In reality, active faults can be very intricate, consisting of multiple fractures along curved, complex paths. Bay Area Earthquake Fault Map Resources San Jose Fault Map South San Jose Fault Map USGS 2014 Significant Earthquakes Archive Hayward ...US Topo Series added to topoView We've added the US Topo series to topoView, giving users access to over 3 million downloadable files from 2009 to the present day. The US Topo series is a latest generation of topographic maps modeled on the USGS historical 7.5-minute series (created from 1947-1992).How to File for Divorce in Michigan. Michigan requires that the spouse filing for divorce must have lived in the state for 180 days before filing and lived in the county for at least the last 10 ...Earthquakes with epicenters in these districts may be felt in Michigan. Approximate Epicenter Calculated Epicenter Map No. Location Latitude North Longitude West Date of Seismic Disturbance Intensity Modified Mercalli Scale 1. Wenona 43°40' 83°54' February 6, 1872 IV 2. Adrian 41°53' 84°03' January 27, 1876---- 3.The New Madrid fault line is best known for some of the most violent earthquakes to ever hit the United States: a series of four in 1811 and 1812. The quakes were estimated at magnitude 7.5 to 8.0, so strong the Mississippi River reportedly flowed backward. Damage occurred as far away as Washington, D.C., and Charleston, S.C.Follow; Twitter; Facebook; GitHub; Flickr; YouTube; InstagramThe New Madrid fault line has still been active in recent years, with over 4000 minor earthquakes occurring since 1974. In a report from November 2008, FEMA warned that a major earthquake is likely to happen in the next 50 years and that the resulting disaster would cause economic losses much higher than that of Hurricane Katrina .Locations of quakes magnitude 2.5 or greater in the Wabash Valley (upper right) and New Madrid (lower left) Seismic Zones. The Wabash Valley Seismic Zone (also known as the Wabash Valley Fault System or Zone) is a tectonic region located in the Midwestern United States, centered on the valley of the Lower Wabash River, along the state line between southeastern Illinois and southwestern Indiana.You can call our Customer Service line at 1-866-500-0017, schedule an appointment to speak with staff, or ask your question of Ava, our online chatbot. Helpful phone numbers and links Lansing local unemployment officeFault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.Esri, HERE, Garmin, FAO, NOAA, USGS, EPA | California Geological Survey, C.W. Jennings, W.A. Bryant |San Andreas fault line map. The San Andreas runs deep near and under some of California's most populated areas. The cities of Desert Hot Springs, San Bernardino, Wrightwood, Palmdale, Gorman, Frazier Park, Daly City, Point Reyes Station and Bodega Bay rest on the San Andreas fault line. The Southern San Andreas slices through Los Angeles ...Michigan is not immune to earthquakes, although it is not in a highly seismic area. The state is home to the Michiana fault zone, which runs from southern Michigan into northern Indiana.January 10, 2024. Divorce. Does fault matter in a Michigan divorce? Yes and no. In the state of Michigan, you are not required to prove fault to file for divorce. As it relates to the grounds for divorce, Michigan is a no-fault state. In fact, Michigan was one of the first states to use a no-fault divorce system, which was adopted in 1971.Himalayan Frontal Thrust. The Himalayan Frontal Thrust (HFT), also known as the Main Frontal Thrust (MFT) is a geological fault in the Himalayas that defines the boundary between the Indian and Eurasian Plates. The fault can be seen via satellite imagery because it is well expressed on the surface. The youngest and southernmost thrust structure ...Share with friends, embed maps on websites, and create images or pdf. Our online map maker makes it easy to create custom maps from your geodata. Import spreadsheets, conduct analysis, plan, draw, annotate, and more.Ground shaking is the most powerful predictor of damage from an earthquake. The U.S. Geological Survey (USGS) National Seismic Hazard Map shows the strength of ground shaking that has a 1 in 50 chance of being exceeded in a particular place in the lower 48 states over a period of 50 years. These maps are used in determining building seismic codes, insurance rates, and other public decisions ...The Oil, Gas, and Minerals Division (OGMD) was previously named the Office of Geological Survey (OGS). In addition to our regulatory duties, the OGS was responsible for geological mapping and applied research. In October 2011, an act of the Legislature established a new Michigan Geological Survey as part of Western Michigan University and ...An online map of faults (Quaternary Fault and Fold Database of the United States) that includes California is in the Faults section of the Earthquake Hazards Program website. Choose the Interactive Fault Map, or download KML files and GIS shapefiles from the links on the page. USGS hazard maps, data, and tools for California and other parts of the United States are in the Seismic Hazard Maps ...Feb 6, 2024 · A new map shows the hazard risks. The map shows the probability of damaging U.S. earthquakes over the next 100 years. A crack formed across California State Route 178 after an earthquake shook the ... The New Madrid fault line is best known for some of the most violent earthquakes to ever hit the United States: a series of four in 1811 and 1812. The quakes were estimated at magnitude 7.5 to 8.0, so strong the Mississippi River reportedly flowed backward. Damage occurred as far away as Washington, D.C., and Charleston, S.C.In Michigan, most fault lines that were potentially visible long ago are now buried deep under sedimentary deposits, so we often don't know they exist until an earthquake happens along them. For example, a fault outside of Kalamazoo was revealed after a 4.2-magnitude earthquake in 2015 — the state's largest since a 4.6-magnitude quake along ...Detailed Description. This map shows earthquakes (circles) of the New Madrid and Wabash Valley seismic zones (orange patches). Red circles indicate earthquakes that occurred from 1974 to 2002 with magnitudes larger than 2.5 located using modern instruments (University of Memphis). Green circles denote earthquakes that occurred prior to 1974 ...Our goal is to study and map surficial processes and landforms related to tectonism, specifically the San Andreas Fault system. With computer processing to remove vegetation, highly accurate, bare-earth digital elevation models of the ground surface are derived to aid in more accurately mapping fault scarps, lineaments, landslides, and …The USGS has many maps of live earthquake data. This section lets visitors see quakes that have occurred anywhere in the world in the last week. You can also focus on geographic regions. Zooming in to a specific quake, you reach a page with specific data and links to the area's seimic and quake damage history.Geologic fault lines in Oregon.The GIS-based map- ping of geological fault locations (from Figure 2) is the complete database of the fault lines in Pakistan which can be used to analyze seismic activity and to estimate the seis ...The EHP contains information about Quaternary faults and folds for the conterminous U.S. It contains locations and information on faults and associated folds that are believed to be sources of significant earthquakes (those of magnitude 6.0 or greater) during the past 1.6 million years. Fault: A fracture or zone of fractures in the Earth's ...New Map Reveals More than 250 Fault Lines in Dallas-Fort Worth Area, Illustrating Potential Earthquake Risk. By Jan Wesner Childs July 24, 2019.New England sits on a spiderweb of faults, according to the USGS. But faults in Massachusetts are small compared to those in western states like California, meaning the likelihood of a devastating quake is slim. The state’s biggest recorded earthquake happened more than 250 years ago, off the coast of Cape Ann in 1755.Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.As shown in Map of Niagara Falls , the fault line is between the border limits of United States and Canada. From Canada can access the best panoramic views and greater flood of this system of large waterfalls. The surrounding city is named after Niagara on the Lake, and includes the province of Ontario. United States, calls American Falls and ...Ground shaking is the most powerful predictor of damage from an earthquake. The U.S. Geological Survey (USGS) National Seismic Hazard Map shows the strength of ground shaking that has a 1 in 50 chance of being exceeded in a particular place in the lower 48 states over a period of 50 years. These maps are used in determining building seismic codes, insurance rates, and other public decisions ...The EHP contains information about Quaternary faults and folds for the conterminous U.S. It contains locations and information on faults and associated folds that are believed to be sources of significant earthquakes (those of magnitude 6.0 or greater) during the past 1.6 million years. Fault: A fracture or zone of fractures in the Earth's ...Attica was shaken by a 5.2 quake in 1929 while Goodnow and Ausable Forks were rattled by 5.1 magnitude quakes in 1983 and 2002, respectively. Ver Straeten said it's not just New York's fault ...on the fault was the 1990 M W7.7 central Luzon earthquake that. Large-scale active fault map of the Philippine fault. based on aerial photograph interpretation. Hiroyuki Tsutsumi *1 and Jeffrey S ...A network configuration was chosen, consisting of a staggered line of ∼100 stations along the main regional faults: the Dead Sea fault and the Carmel fault, and an additional ∼40 stations ...To look up a township in Michigan by address, first look up the address’ county at MichiganTownships.org. The View Map link by any township on the list brings up the MI Locator, wh...Earthquakes and Fault lines. A geospatial analysis of earthquakes in relation to fault lines.A hypothetical magnitude 6.9 earthquake within the Rose Canyon Fault Zone. i. 45% Estimated percentage of residential buildings in the scenario area that would be damaged. 23,000 Estimated number of residential units in the scenario area that would suffer extensive or complete damage. 36,000 Estimated number of households in the scenario area ...Grand Rapids has had: (M1.5 or greater) 0 earthquakes in the past 24 hours. 0 earthquakes in the past 7 days. 0 earthquakes in the past 30 days. 0 earthquakes in the past 365 days. Sorted: Recent. Filter By Magnitude. Nearby Places. 9 years ago 4.2 magnitude, 4 km depth. Details. The Michigan Surface Geology Shapefiles are provided in line and polygon formats. A GIS database of geologic units and structural features in Michigan, with lithology, age, data structure, and format. Product Tags. Reviews. Michigan Geology and Faults. U.S. Geological Survey. "New map shows where damaging earthquakes are most likely to occur in US." ScienceDaily. ScienceDaily, 16 January 2024. <www.sciencedaily.com / releases / 2024 / 01 ...Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.These ancient cracks in the earth's crust have shaped the peninsula over millions of years. If you're looking for a quick answer, here are the three major fault lines in Florida: the Bahama fracture zone, the Gulf Trough, and the Florida Platform basement fault system. In this article, we'll take an in-depth look at these three fault zones.Overview. Active faults in New Zealand are defined as those that have ruptured and/or caused ground deformation during the last 125,000 years (except for in the Taupo Volcanic Zone, where the definition of activity is restricted to the last 25,000 years). Mapping layers include: Active faults, fault sense, recurrence interval, last event, slip ...Esri, HERE, Garmin, FAO, NOAA, USGS, EPA | California Geological Survey, C.W. Jennings, W.A. Bryant |Follow; Twitter; Facebook; GitHub; Flickr; YouTube; InstagramPrevious workers have commonly used seismic-reflection data (GLIMPCE Line A) to demonstrate that the northern rift margin in central Lake Superior developed as a normal growth fault that was ...Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.Neotectonic Features. Neotectonics contains information on faults, folds and other features within Australia that are demonstrated or suspected to relate to the occurrence of large earthquakes during the period that the current crustal stress field has pertained (i.e., the past 5–10 million years).The Michigan Geological Survey's GIS website hosts interactive maps of the surface and bedrock geology of Michigan. The geological maps can be overlain on street, topographic or aerial photographic maps.United States Seismic Zones Map Sorth o .. kou Bismarck * Soocb Dakota Pierre * Tex i .S Austin* IP ,, Seismic Zones (Ground Acceleration) D Zone 0 = O.Og II Zone 1 = 0.075g D Zone 2A = 0.15g D Zone 28 = 0.20g D Zone 3 = 0.30g II Zone 4 = 0.40g Source: 1997 Edition UBC NRC-070 Submitted: 5/8/2015-1-Kaua'l .SeattIe OlymÞiaDetailed geologic and geomorphic mapping along the entire length of the ∼135-km-long Kern Canyon fault zone and the collinear, 11-km-long Breckenridge fault identified late Quaternary traces of both faults. The detailed map of the Kern Canyon and Breckenridge fault traces shows that late Quaternary faulting is typically concentrated …Map of the globe showing seismicity, and the black rectangles outline coverage for each individually-published map. (Public domain.) Seismicity of the Earth Open File Reports: Seismicity of the Earth 1900-2018 (Scientific Investigations Map 3446) Seismicity of the Earth 1900-2007; Seismicity of the Earth 1900-2010, Caribbean plate and ...Turkey earthquake fault lines mapped from space. Published. 10 February 2023. Share. close panel. ... In the era before satellites, geologists would map earthquake faults by walking the lines of ...The map is a simplification of the National Building Code of Canada seismic hazard map for spectral acceleration at a 0.2 second period (5 cycles per second), and shows the ground motions that might damage one- to two-storey buildings. The probability of strong shaking (strong enough to cause significant damage in a fraction of these buildings ...

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michigan fault line map

This map is one of a series of seismicity maps produced by the U.S. Geological Survey that show earthquake data of individual states or groups of states at the scale of 1:1,000,000. This map shows only those earthquakes with epicenters located within the boundaries of Kentucky, even though earthquakes in nearby states or countries may have been felt or may have caused damage in Kentucky.Michigan Counties. In 1796, the acting governor of the territory officially set the boundaries for Wayne County, which, at that time, included all of what later became the state of Michigan and parts of Ohio, Indiana, Illinois and Wisconsin. By 1830, Michigan had 12 organized counties. By 1852, most of the Lower Peninsula counties were established.1:50,000, fault should be more continuous than discontinuous and mapping is accurate at <25,000 scale. 1:100,000, fault could be more discontinuous than continuous and mapping is accurate at <50,000 scale. 1:250,000, fault location may be inferred or is poorly constrained. Click on the fault lines for more information.Fault Lines In Michigan Map. Discover and save your own Pins on Pinterest. The orange bean-shaped area represents the dense magnetic body of rock on the east side of the fault beneath Santa Rosa. There are 69 fault lines in Michigan all located in pen island. There are 69 fault lines in Michigan all located in pen island. The fault is a major influence on landscapes. Many of the most beautiful sites (rivers, lakes, waterfalls and more) in the area are at or near the big Fault. Without the fault there would be no such places. Faults that are associated with the big fault influence many other important landscape features, such as the Portage Channel. 2. GOLDEN, Colo. – Nearly 75 percent of the U.S. could experience damaging earthquake shaking, according to a recent U.S. Geological Survey-led team of 50+ scientists and engineers. This was one of several key findings from the latest USGS National Seismic Hazard Model (NSHM). The model was used to create a color-coded …Where can I find a fault map of the United States? Is one available in GIS format? An online map of United States Quaternary faults (faults active in the last 1.6 million years which …Fault lines are geological features that occur when two tectonic plates move against each other. These movements can cause earthquakes, which can be devastating to infrastructure and human life. Michigan is not typically associated with earthquakes, but there is still a risk due to the presence of fault lines in the state.Valley Fault System (VFS) in the Philippines, is a dominantly dextral strike-slip fault system that extends from Dingalan, Aurora in the north and runs through the cities of Quezon, Marikina ...The Alpine Fault. The Alpine Fault connects two "subduction" margins where the ocean floor descends into the Earth's mantle. At this point the surfaces of the two plates making up the South Islands alpine fault meet. The Pacific Plate on the easterly area of New Zealand is moving westwards and the Australian Plate, on the western side of New ...Overview. Active faults in New Zealand are defined as those that have ruptured and/or caused ground deformation during the last 125,000 years (except for in the Taupo Volcanic Zone, where the definition of activity is restricted to the last 25,000 years). Mapping layers include: Active faults, fault sense, recurrence interval, last event, slip ...This map is from the National Snow and Ice Data center and shows the frost line map across the United States. Note how it moves down from 72-inch depth to a 6-inch depth. The maximum frost line depth is 100-inches as seen near the tip of Minnesota, North Dakota, and Alaska, all the way to zero inches in Florida, southern Arizona, and southern ...Use Lansing Board of Water & Light's power outage map here. To report an outage, call 877-295-5001 or go to the company's website.THE MICHIGAN BASIN. There is a marked contrast between the old, resistant Precambrian and Cambrian rocks of the western half of the Upper Peninsula and the sedimentary rocks of the rest of Michigan. The limestones, sandstones and shales, which dominate the Michigan Basin of the lower peninsula, are approximately 500 million years old, some ....

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