Thunder Bay National Marine Sanctuary
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The Lake Michigan Natural Division Characteristics
The Lake Michigan Natural Division Characteristics Lake Michigan is a dynamic deepwater oligotrophic ecosystem that supports a diverse mix of native and non-native species. Although the watershed, wetlands, and tributaries that drain into the open waters are comprised of a wide variety of habitat types critical to supporting its diverse biological community this section will focus on the open water component of this system. Watershed, wetland, and tributaries issues will be addressed in the Northeastern Morainal Natural Division section. Species diversity, as well as their abundance and distribution, are influenced by a combination of biotic and abiotic factors that define a variety of open water habitat types. Key abiotic factors are depth, temperature, currents, and substrate. Biotic activities, such as increased water clarity associated with zebra mussel filtering activity, also are critical components. Nearshore areas support a diverse fish fauna in which yellow perch, rockbass and smallmouth bass are the more commonly found species in Illinois waters. Largemouth bass, rockbass, and yellow perch are commonly found within boat harbors. A predator-prey complex consisting of five salmonid species and primarily alewives populate the pelagic zone while bloater chubs, sculpin species, and burbot populate the deepwater benthic zone. Challenges Invasive species, substrate loss, and changes in current flow patterns are factors that affect open water habitat. Construction of revetments, groins, and landfills has significantly altered the Illinois shoreline resulting in an immeasurable loss of spawning and nursery habitat. Sea lampreys and alewives were significant factors leading to the demise of lake trout and other native species by the early 1960s. -
AN OVERVIEW of the GEOLOGY of the GREAT LAKES BASIN by Theodore J
AN OVERVIEW OF THE GEOLOGY OF THE GREAT LAKES BASIN by Theodore J. Bornhorst 2016 This document may be cited as: Bornhorst, T. J., 2016, An overview of the geology of the Great Lakes basin: A. E. Seaman Mineral Museum, Web Publication 1, 8p. This is version 1 of A. E. Seaman Mineral Museum Web Publication 1 which was only internally reviewed for technical accuracy. The Great Lakes Basin The Great Lakes basin, as defined by watersheds that drain into the Great Lakes (Figure 1), includes about 85 % of North America’s and 20 % of the world’s surface fresh water, a total of about 5,500 cubic miles (23,000 cubic km) of water (1). The basin covers about 94,000 square miles (240,000 square km) including about 10 % of the U.S. population and 30 % of the Canadian population (1). Lake Michigan is the only Great Lake entirely within the United States. The State of Michigan lies at the heart of the Great Lakes basin. Together the Great Lakes are the single largest surface fresh water body on Earth and have an important physical and cultural role in North America. Figure 1: The Great Lakes states and Canadian Provinces and the Great Lakes watershed (brown) (after 1). 1 Precambrian Bedrock Geology The bedrock geology of the Great Lakes basin can be subdivided into rocks of Precambrian and Phanerozoic (Figure 2). The Precambrian of the Great Lakes basin is the result of three major episodes with each followed by a long period of erosion (2, 3). Figure 2: Generalized Precambrian bedrock geologic map of the Great Lakes basin. -
Mackinac County
MACKINAC COUNTY S o y C h r t o u Rock r u BETTY B DORGANS w C t d 8 Mile R D n 6 mlet h o i C d t H o y G r e e Island LANDING 4 CROSSING B u N a Y o d Rd R R R 4 e 8 Mile e y 4 1 k t R k d n 2 ix d t S 14 7 r i Advance n p n 17 d i m Unknow d o e a F u 5 C 123 t e T 7 x k d y O l a o s e i R i R 1 Ibo Rd 1 r r e r Sugar d C M o d Island R a e d R 4 p y f e D c E e S l e n N e i 4 C r a R E R o Y d R L 221 e v a i l 7 R h d A i w x d N i C n S a e w r d g d p e n s u d p 5 a c o r R a r t e B U d d T Island in t g G i e e a n r i g l R R n i o R a d e e R r Rd d o C C o e d d 9 Mile e c 4 r r g k P r h d a L M e n M t h R v B W R R e s e 2 r R C R O s n p N s l k n RACO ea l e u l 28 o ROSEDALE n i R C C d 1 y C l i ree a e le Rd e k a U d e v i 9 Mi e o S y r S a re e d i n g C R R Seney k t ek N e r h C Shingle Bay o U e i u C s R D r e U essea S Sugar B d e F s h k c n c i MCPHEES R L n o e f a a r s t P x h B y e d ut a k 3 So i r k i f u R e t o 0 n h a O t t 1 3 R r R d r r A h l R LANDING 3 M le 7 7 s i T o 1 E d 0 M n i 1 C w a S t U i w e a o s a kn ECKERMAN t R R r v k C o n I Twp r C B U i s Superior e e Island h d d e b Mile Rd r d d Mile Rd 10 e a S f 10 o e i r r q l n s k i W c h n d C u F 3 Columbus u T l McMillan Twp ens M g C g a h r t E a h r 5 Mo reek R n E T 9 H H q m REXFORD c e i u a DAFTER n R W r a l k 5 o M r v Twp Y m r h m L e e C p e i e Twp F s e STRONGS d i Dafter Twp H ty Road 462 East R t d e a Coun P n e e S n e r e v o v o s l d C i R m s n d T o Twp h R t Chippewa l p R C r e NEWBERRY U o e R a n A -
Line 5 Straits of Mackinac Summary When Michigan Was Granted
Line 5 Straits of Mackinac Summary When Michigan was granted statehood on January 26, 1837, Michigan also acquired ownership of the Great Lakes' bottomlands under the equal footing doctrine.1 However before Michigan could become a state, the United States first had to acquire title from us (Ottawa and Chippewa bands) because Anglo-American law acknowledged that we owned legal title as the aboriginal occupants of the territory we occupied. But when we agreed to cede legal title to the United States in the March 28, 1836 Treaty of Washington ("1836 Treaty", 7 Stat. 491), we reserved fishing, hunting and gathering rights. Therefore, Michigan's ownership of both the lands and Great Lakes waters within the cession area of the 1836 Treaty was burdened with preexisting trust obligations with respect to our treaty-reserved resources. First, the public trust doctrine imposes a duty (trust responsibility) upon Michigan to protect the public trust in the resources dependent upon the quality of the Great Lakes water.2 In addition, Art. IV, § 52 of Michigan's Constitution says "conservation…of the natural resources of the state are hereby declared to be of paramount public concern…" and then mandates the legislature to "provide for the protection of the air, water and other natural resources from 3 pollution, impairment and destruction." 1 The State of Michigan acquired title to these bottomlands in its sovereign capacity upon admission to the Union and holds them in trust for the benefit of the people of Michigan. Illinois Central Railroad Co. v. Illinois, 146 U.S. 387, 434-35 (1892); Nedtweg v. -
FINAL GEOLOGIC REPORT Emerged
although the conditions of extreme chaos anticipated were not encountered. Geological exploration has established the solidarity of bedrock underlying the Straits of Mackinac and its adequacy to support the comparatively modest loads that will be imposed by the structure. D. B. STEINMAN, CONSULTING ENGINEER MACKINAC BRIDGE Some 300-400 million years ago in early to mid- Devonian time, the land mass in the area of the Straits FINAL GEOLOGIC REPORT emerged. This pseudo-uplift, due to the retreat of the Devonian sea, quickened ground water movement and Jack C. Rosenau thereby, leaching of the salt beds of the Salina Resident Geologist Formation of the Silurian Period. As a result of the April 20, 1956 leaching, two important geological formations came into being: (1) the brine water worked its way into the Michigan Basin and deposited the upper salt beds of the Introduction Detroit River Formation, and (2) the solution of large quantities of rock salt left great voids or cavernous areas The Straits of Mackinac is a 70-mile connecting link with an overlying rock mass of shales, limestones, between Lakes Michigan and Huron; its width at the site dolomites, cherts, sandy shales and gypsum or of the Mackinac Bridge is 4 miles and its depth is known anhydrite. These deposits are the Salina (Pointe Aux to be at least 290 feet below lake level (578.5’ USLS, Chenes) and Bass Island (St. Ignace) Formations of the MLWD). The greatest depth to rock is more than 350 Silurian age and the Garden Island, Bois Blanc and feet and is located about mid-stream. -
Geology of Michigan and the Great Lakes
35133_Geo_Michigan_Cover.qxd 11/13/07 10:26 AM Page 1 “The Geology of Michigan and the Great Lakes” is written to augment any introductory earth science, environmental geology, geologic, or geographic course offering, and is designed to introduce students in Michigan and the Great Lakes to important regional geologic concepts and events. Although Michigan’s geologic past spans the Precambrian through the Holocene, much of the rock record, Pennsylvanian through Pliocene, is miss- ing. Glacial events during the Pleistocene removed these rocks. However, these same glacial events left behind a rich legacy of surficial deposits, various landscape features, lakes, and rivers. Michigan is one of the most scenic states in the nation, providing numerous recre- ational opportunities to inhabitants and visitors alike. Geology of the region has also played an important, and often controlling, role in the pattern of settlement and ongoing economic development of the state. Vital resources such as iron ore, copper, gypsum, salt, oil, and gas have greatly contributed to Michigan’s growth and industrial might. Ample supplies of high-quality water support a vibrant population and strong industrial base throughout the Great Lakes region. These water supplies are now becoming increasingly important in light of modern economic growth and population demands. This text introduces the student to the geology of Michigan and the Great Lakes region. It begins with the Precambrian basement terrains as they relate to plate tectonic events. It describes Paleozoic clastic and carbonate rocks, restricted basin salts, and Niagaran pinnacle reefs. Quaternary glacial events and the development of today’s modern landscapes are also discussed. -
Wisconsin's Door Peninsula and Its Geomorphology
WISCONSIN'S DOOR PENINSULA AND ITS GEOMORPHOLOGY Howard De II er AGS Collection, UW-Mllwaukee and Paul Stoelting University of Wisconsin-La Crosse The Door Peninsula of Wisconsin is one of the premier tourist regions of the American r~iddle West. According to a recent geography of Wisconsin (Vogeler et al 1986,8) , the region is best known for its picturesque sea scape, New England-style architecture, fish boils, and cherry orchards. Among geomorphologists, however, the region is known for the great variety of land form types and for the complex and changing geomorphological processes which have operated in the peninsula. Towering bluffs, sand dunes, lake terraces, abandoned beach ridges, swampy lowlands, and drumlin fields are only some of the many types of landforms to be found in the peninsula. Indeed, the region can be viewed as a unique geomorphological laboratory and an excellent example for classroom study. In this short paper an attempt is made to describe and analyze some of the more prominent landform features of the peninsula and the processes which have influenced their formation. LOCATION AND GENERAL CHARACTERISTICS The Door Peninsula, located In northeastern Wisconsin. is part of the Eastern Ridges and Lowlands province of the state. The peninsula extends in a northeasterly direction into Lake Michigan to separate Green Bay on the west from the main body of Lake Michigan on the east. The peninsula is approximately 64 miles long and about 26 miles wide on its southern end, between the mouth of the Fox River and the city of Kewaunee on Lake Michigan (Map I). -
2019 State of the Great Lakes Report Michigan
MICHIGAN State of the Great Lakes 2019 REPORT 2019 STATE OF THE GREAT LAKES REPORT Page 1 Contents Governor Whitmer’s Message: Collaboration is Key ............................................................... 3 EGLE Director Clark’s Message: New Advocates for the Great Lakes Community ................. 4 New Standards Ensure Safe Drinking Water in the 21st Century ............................................ 5 Public Trust Doctrine and Water Withdrawals Aim to Protect the Great Lakes ........................ 8 High Water Levels Put State on Alert to Help Property Owners and Municipalities .................11 Asian Carp Threat from Chicago Area Looms Over Health of Lakes and Aquatic Life ............ 13 EGLE Collaborates on Research into Harmful Algal Blooms and Response Measures .......... 15 Initiatives Foster Stewardship, Raise Water Literacy for All Ages.......................................... 18 Michigan Communities Empowered to Take Action for Great Lakes Protection ...................... 22 EGLE Strengthens Michigan’s Sister State Relationship With Japan’s Shiga Prefecture ....... 24 Soo Locks Project Finally Underway with 2027 Target Date for Opening............................... 25 Great Lakes Cruises Make Bigger Waves in State’s Travel Industry ............................................. 26 MICHIGAN.GOV/EGLE | 800-662-9278 Prepared by the Michigan Department of Environment, Great Lakes, and Energy on behalf of the Office of the Governor (July 2020) 2019 STATE OF THE GREAT LAKES REPORT Page 2 Collaboration is Key hroughout the Great Lakes region, the health of our communities and the strength of our T economies depend on protecting our shared waters. The Great Lakes region encompasses 84 percent of the country’s fresh surface water, represents a thriving, $6 trillion regional economy supporting more than 51 million jobs, and supplies the drinking water for more than 48 million people. -
Northern Michigan's
Northern MIchigan’s 2010 Report Bass Lake Birch Lake Deer Lake Huffman Lake Larks Lake Long Lake Marion Lake GNoweland Lakem Silver Lake Susan LLake ThumbaLake Twikn Lake Wildewood Lakes What would Michigan be without water? One might as well to protect lakes throughout Northern Michigan. Projects ask what the Sahara would be without sand or the Himalayas carried out on these lakes have ranged from lake-wide without mountains. Michigan is defined by water and, aquatic plant surveys to individual shoreline property in fact, the definition of Michigan in some Native American restoration projects. Details about recent projects involving languages literally means water, “big lake” to be precise. the Gem Lakes are included in this report. Water formed Michigan, frozen water that is, thousands of We hope you find the information presented in this report feet thick. A series of glaciers advanced and retreated across both interesting and insightful. If you have any questions, Michigan over the course of millions of years, creating the comments, or concerns, please contact Tip of the Mitt present-day landscape of rolling hills and broad plains; Watershed Council at (231) 347-1181 or visit our website at dotted with lakes, crisscrossed with rivers, and surrounded www.watershedcouncil.org. by freshwater seas. Glacial scouring and huge ice chunks that were left behind formed thousands of lakes across the landscape, lakes of all shapes and sizes, each unique: each beautiful and special in its own way. Many people live in or travel through Northern Michigan because of these lakes and the character they lend to the region. -
The Watersheds of Northeast Michigan
The Watersheds of Northeast Michigan What is a Watershed? Did you know that everywhere you are, you’re within a watershed? A watershed is an area of land that contains a common set of streams, rivers and lakes that all drain into a larger waterbody. Watershed boundaries follow natural features of the landscape, such as a ridgeline or a height-of-land (see diagram at right). Watersheds include both the water features within the area, as well as the land surrounding those water bodies. As a result of the connected nature of a watershed, all activities on the land and water can affect the condition of the larger watershed. A watershed can be divided into progressively smaller watersheds, which are often referred to as subswatersheds. For example, the Klacking Creek Watershed is one of many subwatersheds that can be identified within the larger Rifle River Watershed. Likewise, the Rifle River Watershed itself is part of the larger Lake Huron Watershed. Watershed diagram: www.upperdesplainsriver.org Huron Pines is a nonprofit 501(c)(3) organization and an equal opportunity provider. Our dynamic staff of ecologists, geographers, biologists and environmental educators think big and act quickly to ensure that Northeast Michigan’s watersheds and wild places will stay healthy and resilient for future generations. Located right in the center of the Great Lakes system, we have the unique privilege and responsibility to protect our treasured lands teeming with wildlife, and to sustain the world’s most important source of fresh water. Learn more at -
The Illinois Coast of Lake Michigan 25 Michael J
The Illinois Coast of Lake Michigan 25 Michael J. Chrzastowski INTRODUCTION within the Illinois extent of Lake Michigan is about 490 feet (149.4 m). The Illinois coast of Lake Michigan is one of the state’s most dynamic geological settings. Coastal processes of WI waves, ice, and changing lake levels contribute to yearlong IL Winthrop North Point Marina and seasonal erosion and deposition (accretion) along the Harbor Illinois Beach Zion beaches and across the nearshore lake bottom, although State Park Beach Park major change also can occur in days or even hours. Lake The social and economic importance of the Illinois Michigan MI Waukegan Sheboygan coast cannot be overstated. This coast borders the most Waukegan Harbor populous part of the state and includes some of the most Illinois extent valued real estate in Illinois. It is also the most densely Naval Training Center of Lake North Chicago Great Lakes Michigan populated coastal area in the entire Great Lakes region and (Great Lakes Harbor) Lake Bluff WI has the region’s highest degree of engineering and human IL 0 40 mi Lake Forest 0 40 km modification. Notably, the historical development of Chi- MI CHICAGO IN cago, Waukegan, and the other municipalities along the Indiana Dunes shore was strongly influenced by the coastal geology. Highwood Despite extensive urbanization, the Illinois coastal LAKE CO. Highland Park zone preserves an exceptional geological record of coastal COOK CO. Glencoe Lake Michigan evolution that spans about 14,000 years, beginning in late Winnetka Kenilworth Wilmette Harbor glacial time when an ancestral shoreline first formed. -
Door County Fact Sheet Page 2
DDoooorr CCoouunnttyy Media Contact: Jon Jarosh Director of Communications & PR (920) 818-1133 or [email protected] FFaacctt SShheeeett www.DoorCounty.com/media Cana Island Lighthouse • Door County, Wisconsin is approximately 70 miles long. It’s about 18 miles wide at its widest point in the southern part of the county and narrows to less than 2 miles across at the northern tip of the peninsula. • Door County has 300 miles of shoreline and is surrounded by water on three sides. Lake Michigan lies to the north and east, and the bay of Green Bay (part of Lake Michigan) lies to the west. • It takes more than an hour to drive from the county line in the southern part of the peninsula to the end of Hwy 42 at Northport, the northern tip of the peninsula. • Door County has 34 named outlying islands, the largest of which is Washington Island, which lies off the northern tip of the peninsula. Washington Island covers approximately 35 square miles and has a year round population of around 700 people. A vehicle/passenger ferry connects Washington Island (via the Death’s Door water passage) with the rest of the world 365 days a year, weather permitting. • Founded in 1851, Door County is named after Death’s Door, the aptly named water passage that lies off the tip of the peninsula where the waters of Lake Michigan and Green Bay converge. Death’s Door is the English translation of Porte Des Morts, the name given to this treacherous water passage by early French explorers based on Native American stories they heard and their own perilous experiences.