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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.
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 ...
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).
Designated. 1967. The Devil's Bathtub. Mendon Ponds Park is a county park located southeast of Rochester, New York within the suburban towns of Mendon and Pittsford. At over 2,500 acres (10 km 2 ), it is the largest park in Monroe County. [1] It was designated a National Natural Landmark in 1967 in recognition of its unique glacial geology. [2]
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The X-bentonite is radiometrically dated to 96 or 95 million years ago and it identifiable throughout the Western Interior Seaway marine sediments. At the Graneros type location, which was generally the deepest part of the Western Interior Seaway, the X-bentonite is actually in the lowest beds of the overlying Greenhorn Formation.
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 ...
Manning Pool (Brockton) One of two public pools in Brockton, the Manning Pool is set to open June 28 and is open to the public from 1 p.m. to 6 p.m. daily. An entry fee of $5 is required, however ...
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