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The soil of Sand Ridge State Forest is 89% sand, 8% clay, and 3% silt. [5] There are two types of sand, red and yellow. [6] Dunes and swales were created after sand was deposited, but before vegetation could grow, during what is called the Parkland Formation. [1] [2] Dunes range from 6 m (20 ft) up to 30 m (98 ft). [1]
The Sankoty sand is an unconsolidated deposit within a bedrock valley formerly occupied by the ancestral Mississippi River. It is classified as a member of the Banner Formation and occupies the same stratigraphic position as the Mahomet sand. The Sankoty sand has distinctive characteristics that are readily recognized in sample cuttings.
There are two primary mechanisms of stream bank erosion: fluvial erosion and mass failure. Fluvial erosion is the direct removal of soil particles by flowing water. The rate of fluvial erosion is determined both by the force of the flowing water (e.g. faster flow equals more force) and the resistance of the bank material to erosion (e.g. clay is generally more resistant to erosion than sand).
Irrigation water can become infested from bay trees in the forest (if the irrigation source is a stream), from bay trees overhanging irrigation ponds, from runoff from infested forests, [67] or from recirculated irrigation water. [68]
The Sand Prairie-Scrub Oak Nature Preserve, formerly called the Mason County State Wildlife Refuge and Recreation Area, is a 1,460 acre (591 ha) State Natural Area and Illinois Nature Preserve located in western Mason County, Illinois. The nearest town is Kilbourne, Illinois and the nearest numbered highway is Illinois Route 97. It contains ...
A submerged forest is the in situ remains of trees, especially tree stumps, that lie submerged beneath a bay, sea, ocean, lake, or other body of water. These remains have usually been buried in mud, peat, or sand for several thousand years before being uncovered by sea level change and erosion and have been preserved in the compacted sediment ...
Freeport is a small industrial city of 24,000 in northwest Illinois. For a price tag of $13 million, it's building a new public water system to tap deep into new, uncontaminated water sources.
The Illinois List of Endangered and Threatened Species is reviewed about every five years by the Illinois Endangered Species Protection Board (ESPB). [1] To date it has evaluated only plants and animals of the US state of Illinois, not fungi, algae, or other forms of life; species that occur in Illinois which are listed as endangered or threatened by the U.S. federal government under the ...