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The Deicke and Millbrig bentonite layers, specifically the potassium bentonite layer, K-bentonite, were formed from a volcanic eruption during the Taconic orogeny during the Late Ordovician on Laurentia, the craton of North America. Researchers are very interested in the eruptions that formed these bentonite layers because they are thought to ...
Bentonite layers from an ancient deposit of weathered volcanic ash tuff in Wyoming Gray shale and bentonites (Benton Shale; Colorado Springs, Colorado). Bentonite (/ ˈ b ɛ n t ə n aɪ t / BEN-tə-nyte) [1] [2] is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite.
Phosphogypsum. Phosphogypsum stack located near Kėdainiai, Lithuania 55°14′47″N 24°01′44″E. Phosphogypsum (PG) is the calcium sulfate hydrate formed as a by-product of the production of fertilizer, particularly phosphoric acid, from phosphate rock. It is mainly composed of gypsum (CaSO 4 ·2H 2 O).
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The Graneros Shale is primarily dark gray sandy and silty shale with minor sandstone and limestone lenses, with visible crystalline minerals ( pyrite, marcasite, selenite, calcite ). It also features septarians and other concretions. It rests on the Dakota Group and is in turn overlain by the Greenhorn Limestone.
The San Francisco Bay Salt Ponds are a roughly 16,500-acre (6,700 ha) part of the San Francisco Bay that have been used as salt evaporation ponds since the California Gold Rush era. Most of the ponds were once wetlands in the cities of Redwood City, Newark, and Hayward, and other parts of the bay. Salt production goes back to when the Ohlone ...
164 ft (50 m) [1] Toddy Pond is a narrow lake, eight-miles long, in Hancock County, Maine. South Toddy leads from Surry and Blue Hill townships via a narrow channel to Middle Toddy that is edged by Surry and Penobscot townships. All of North Toddy, which is connected to Middle Toddy by another narrow channel, lies in Orland township.
Hampton Ponds State Park. Hampton Ponds State Park is a Massachusetts state park located in the northeast corner of the city of Westfield. The park offers water-based activities including swimming, motorized and non-motorized boating, and fishing plus facilities for picnicking. The park is managed by the Department of Conservation and Recreation.
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