Long Island

:This article is about Long Island in New York State. For other uses, see Long Island (disambiguation)

Geology

Geologically, the island is formed of two spines of glacial moraine, consisting largely of gravel and loose rock over deeply-buried bedrock, formed during the two most recent pulses of the Wisconsinan glaciation,also by a chain of volcanos and earthquakes, with a sandier outwash plain beyond. The island's tallest point is Jayne's Hill near Melville, with an elevation of 400.9 feet (122.2 m) above sea level. The island is separated from the mainland by the East River - actually not a river but both a tidal strait and a tidal estuary.

Related Topics:
Glacial moraine - Wisconsinan glaciation - Melville - East River - Strait - Estuary

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