- Physiographic provinces of Illinois
Physiography is the study of the creation and gradual change of land surface forms (the landscape). Thus, the land surface as we see it today in each of the physiographic provinces has had a particular history of development. Driftless Area Wisconsinan Moraines Illinoian Till Plain Mississippi River Wabash River Shawnee Hills Ohio River - The earth with a segment removed to show supposed internal zones
Crust (6-30 miles) Mantle (1800 miles) Outer core (1400 miles) Inner core (750 miles) The core is the innermost zone of the earth. It is mainly iron with some nickel and cobalt. The inner core probably is solid, but the outer core may consist of the same elements in a molten form. The core is the most dense (heaviest) of the three zones. - Extent of the main glacial advances
Extent of the main glacial advances which began with the Nebraskan (a—the oldest) and ended with the late Wisconsinan (f—the youngest). Diagram “d” shows the major stream development during the time between the Illinoian and the earliest Wisconsinan glaciers. The heavy lines on the diagrams indicate major stream valleys that were present during these times. a. Inferred limit of NEBRASKAN glaciation b. Inferred limit of KANSAN glaciation c. ILLINOIAN glacial advance d. SANGAMONIAN major drainage e. Maximum WISCONSINAN glacial advance f. Late WISCONSINAN Valparaiso front and Kankakee Flood - Limits of ice age glaciers
In Canada vast thicknesses of snow and ice accumulated until the weight of the ice finally caused it to flow slowly outward, mainly to the south. Rocks and surface materials of all types were picked up and carried by the glaciers for great distances before being deposited. Pieces of granite, quartzite, and native copper among the many local rocks and minerals are found in glacial deposits and indicate that at least part of these deposits came from the Great Lakes Region. The materials deposited range from clay-size minerals to large boulders. - Woolly mammoth
Scattered mammoth and mastodon remains have been found in glacial deposits at various localities in the state. Peat, which is an accumulation of partially decomposed plant materials, has been found, especially in the northern part of the state. It is marketed as an organic soil conditioner. - Reconstruction of coal-forming swamp
Coal is a combustible rock that was formed by the accumulation and partial decay of vegetation. When coal was forming millions of years ago, most of the state was a low coastal plain bordered on the west and southwest by a shallow sea. A large variety of plants grew in great swamps which covered this coastal plain. When the plants died, they accumulated in the swamps to form thick masses of peat that were eventually covered by shallow seas and buried beneath mud and sand. Periodically, the region was above sea level, new swamps developed, new peat deposits accumulated, and more sediments were laid down. This process occurred repeatedly until over 3,000 feet of sediments had been deposited. Then the sediments were slowly compacted and hardened so that sandstones, shales, limestones, and coals were formed. - Captain John Smith’s Map of New England
The Pilgrims were familiar with Capt. John Smith’s account of a voyage in which he had surveyed the coast from Cape Cod to Penobscot Bay in 1614. He had even offered his services as guide and military captain, but Myles Standish got the job. Undoubtedly they did bring with them his Description of New England (London, 1616), in which the following map was published. Capt. Smith, who had already gained some fame and fortune in Virginia, dedicated to Prince Charles this effort in which the term “New England” first appeared: “... it being my chance to range some other parts of America, whereof I here present your highness the description in a map, my humble suit [in original, “sure”] is you would please to change their barbarous names for such English, as posterity may say Prince Charles was their godfather.” Several English place-names were incorporated in the map, but posterity disregarded most of them, a noteworthy exception being “Plimouth.” Smith notes that the Indians called the site “... Accomack, an excellent good harbor, good land, and no want of any thing but industrious people,” recalling that “After much kindness, upon a small occasion we fought also with 40 or 50 of those [Indians]; though some were hurt and some slain, yet within an hour after, they became friends.” - Samuel de Champlain’s Map of Plymouth Harbor
Although the Pilgrims were the first Europeans to establish a permanent colony in northeastern North America, they did not come to an unknown land. As early as 1605, Samuel de Champlain had mapped Plymouth Harbor, in the course of a three-year expedition during which he explored the coast from Nova Scotia to Martha’s Vineyard. The quality of his detailed and accurate observations on the land and people appears in this map, and in his notes on the visit: “There came to us two or three canoes, which had just been fishing for cod and other fish which are found there in large numbers. These they catch with hooks made of a piece of wood, to which they attach a bone in the shape of a spear and fasten it very securely. The whole has a fang-shape, and the line attached to it is made out of the bark of a tree. They gave me one of their hooks, which I took out of curiosity. In it the bone was fastened on by hemp, like that in France, as it seemed to me, and they told me that they gathered this plant without being obliged to cultivate it, and indicated that it grew to the height of four or five feet. This canoe went back on shore to give notice to their fellow inhabitants, who caused columns of smoke to arise on our account. We saw eighteen or twenty savages, who came to the shore and began to dance. Our canoe landed in order to give them some bagatelles, at which they were greatly pleased. Some of them came to us and begged us to go to their river. We weighed anchor to do so, but were unable to enter on account of the small amount of water, it being low tide, and were accordingly obliged to anchor at the mouth. I went ashore, where I saw many others, who received us very cordially. I made also an examination of the river, but saw only an arm of water extending a short distance inland, where the land is only in part cleared. Running into this is merely a brook not deep enough for boats except at full tide. The circuit of the bay is about a league. On one side of the entrance to this bay there is a point which is almost an island, covered with wood, principally pines, and adjoins sandbanks, which are very extensive. On the other side, the land is high. There are two islets in this bay, which are not seen until one has entered, and around which it is almost entirely dry at low tide. This place is very conspicuous from the sea, for the coast is very low, excepting the cape at the entrance to the bay. We named it the Port du Cap. St. Louis...”.