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In 1874 he accompanied one of the parties sent out by the United States government to observe the transit of Venus, and was stationed at Queenstown, New Zealand.On his return in 1875 he was appointed assistant in geology at the School of mines, and in 1878 he became assistant geologist on the United States geological and geographical survey west of the 100th meridian.
Map of Minnesota bedrock by age. Shaded relief image: Superior Upland in the northeast, the flat Red River Valley in the northwest, Central Minnesota's irregular landscape, the Coteau des Prairies and Minnesota River in the southwest, and the southeast's dissected Driftless Area along the Mississippi River below its confluences with the Minnesota and St. Croix in East Central Minnesota
The pale yellow portion shows the Upper Peninsula (UP) of Michigan. Marquette is on the south shore of Lake Superior, straight north of the "'r' in the word 'Upper'". Recent geologic mapping in the Marquette, Michigan, U.S., area provides information of the structure for the zone along a 10 km (6.2 mi) strike.
Cliffs of Palisade Head on Lake Superior. The North Shore Highlands are a physiographic and ecological region of the U.S. state of Minnesota in central North America. They were formed by a variety of geologic processes, but are principally composed of rock created by magma and lava from a rift about 1.1 billion years ago, which rock formations are interspersed with and overlain by glacial ...
The Duluth Complex includes much of Minnesota's Arrowhead Region north of Lake Superior.From the west near Duluth, Minnesota, it arcs north and northeast to about 48° north latitude south of Knife Lake, proceeds east at that latitude some five to twenty kilometers distant from and south of the Canada–US border to about 90° west longitude where it joins the border at the Pigeon River, and ...
Lake Maracaibo is considered by some to be the second-oldest lake on Earth, but since it lies at sea level and nowadays is a contiguous body of water with the sea, others consider that it has turned into a small bay. The longest lake is Lake Tanganyika, with a length of about 660 kilometres (410 mi) (measured along the lake's center line).
Lake Waccamaw is a fresh water lake located in Columbus County in North Carolina.It is the largest of the natural Carolina Bay lakes. [2] Although bay trees (Magnolia virginiana L., Gordonia lasianthus Ellis, and Persea) are present within many Carolina Bays, [3] the term "bay" does not refer to the trees but comes instead from an early science publication by Glenn (1895), who used the word ...
Lake Algonquin is an example of a proglacial lake that existed in east-central North America at the time of the last ice age. Parts of the former lake are now Lake Huron, Georgian Bay, Lake Superior, Lake Michigan and inland portions of northern Michigan. [1] Examples in Great Britain include Lake Lapworth, Lake Harrison and Lake Pickering.
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