interbedding of silt and clay

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Geology of Tasmania — Tasmania has a varied geological history, with the world s biggest exposure of diabase, or dolerite. Rocks from the Neoproterozoic, Paleozoic and Mesozoic time periods appear. It is one of the few southern hemisphere areas glaciated during the… … Wikipedia
Surficial aquifer — [ Broward County, Florida] Surficial aquifers are shallow aquifers typically less than 50 feet (15m), but thicknesses of about 60 feet have been mapped. Composition Surficial aquifers system consists mostly of beds of unconsolidated sand, cavity… … Wikipedia
Marcellus Formation — Stratigraphic range: Middle Devonian … Wikipedia

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