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Paleogeographic reconstruction showing the Illinois Basin area during the Middle Devonian period. [9] Almost all Silurian rocks in Illinois are deep-water limestone and dolomite deposits; reef habitats were common, and fossils of reef organisms are locally highly abundant, including corals, brachiopods, crinoids, stromatoporoids, and bryozoans. [6]
Illinois' ecology is in a land area of 56,400 square miles (146,000 km 2); the state is 385 miles (620 km) long and 218 miles (351 km) wide and is located between latitude: 36.9540° to 42.4951° N, and longitude: 87.3840° to 91.4244° W, [1] with primarily a humid continental climate.
Under Mark's leadership, the Conservancy's Illinois chapter purchased the 47.5-acre (19.2 ha) bog and donated it to the University of Illinois in 1958; this was the first land purchase made by the Illinois Nature Conservancy. [3] The university served as the bog's custodian from 1958 until 1970.
Digitalis purpurea, the foxglove or common foxglove, is a toxic species of flowering plant in the plantain family Plantaginaceae, [2] native to and widespread throughout most of temperate Europe. [3] It has also naturalized in parts of North America, as well as some other temperate regions. The plant is a popular garden subject, with many ...
Agalinis aspera, the rough agalinis, rough false foxglove, or tall false foxglove, is a non-poisonous plant of the genus Agalinis, habitating in the dry prairies. It can grow to be about eight to twenty-four inches tall. When the flowers bloom, the colors vary between purple and pink.
Illinois was covered by a sea during the Paleozoic. Over time this sea would be inhabited by animals like brachiopods, clams, corals, crinoids, snails, sponges, trilobites. [3] 500 million years ago, during the Cambrian, the seas of Illinois resembled those of the modern Bahamas. [4] At the time, Illinois was located near the equator. [5]
Digitalis lanata is a biennial or perennial growing from a woody, horizontal rootstock. [7] There is a tidy rosette before the spike goes up, and it is neatly arranged around the purple-tinged stems. The plant commonly forms a single, upright, more or less uniformly leafy stem that is partly ascending at the base. [ 7 ]
The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky. The basin is elongate, extending approximately 400 miles (640 km) northwest-southeast, and 200 miles (320 km) southwest-northeast.