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The Palisades Sill as seen from the Palisades Interstate Parkway. The Hudson River is the background. The Palisades Sill is a Triassic, 200 Ma diabase intrusion. It extends through portions of New York and New Jersey. It is most noteworthy for The Palisades, the cliffs that rise steeply above the western bank of the Hudson River.
Palisades as seen from West 187th Street and Chittenden Avenue in Washington Heights, Manhattan George Walbridge Perkins , who served as president of the Palisades Interstate Park Commission from its creation in 1900 until his death in 1920, with whom she had been working, raised another $1.5 million from a dozen wealthy contributors including ...
Because rifting thinned the crust, magma upwelled and intruded the basin, producing the feldspar and pyroxene dominant diabase of the Palisades Sill and an almost pure layer olivine up to six meters thick. The sill intruded 195 million years ago in the Early Jurassic. Cooling of the melt led to columnar fracture giving its column-like appearance.
Hook Mountain, part of the "Hook Mountain and Nyack Beach State Park National Natural Landmark", designated in 1980 for its portion of the Palisades Sill.. The National Natural Landmarks in New York include 29 of the more than 600 National Natural Landmarks (NNLs) in the United States.
The sun is seen behind smoke above charred structures burned by the Palisades Fire in the Pacific Palisades neighborhood of Los Angeles, California, on Jan. 8, 2025. / Credit: AGUSTIN PAULLIER/AFP ...
Palisades Park (Counting Crows song), a song by Counting Crows; Palisade Avenue (Hudson Palisades) in Hudson and Bergen, New Jersey; Palisades Center, a major shopping center in West Nyack, New York; Palisades Charter High School, in Los Angeles, California; Palisades Dam, Idaho; Palisades Interstate Parkway, a highway in New York and New Jersey
This is the same formation that appears in New Jersey and upstate New York along the Hudson River in Palisades Interstate Park. The sill extends southward beyond the cliffs in Jersey City beneath the Upper New York Harbor and resurfaces on Staten Island. The Palisades sill date from the Early Jurassic period, 192 to 186 million years ago.
They include the Palisades Sill, a Triassic, 200-Ma diabase intrusion that forms the Palisades along 80 kilometers (50 mi) of the Hudson River in New York and New Jersey. Vast areas of trap rock in the form of thick lava flows and other volcanic rocks comprise the Deccan Traps of India and Siberian Traps of Russia. [6]