catskill delta造句

• The Catskill Delta complex consists of a coarsening upward sequence of rocks.
• Overall, this part of New York is represented by lower Paleozoic sedimentary rocks that Catskill Delta, which is also Devonian in age.
• The Catskill Delta was created from run off from the Acadian Mountains ( " Ancestral Appalachians " ) which covered the area where New York City now exists.
• This transformation and uncovering is the primary reason why the Catskill Delta is notable in the present; western Pennsylvania's petroleum was formed as a consequence.
• Note that in older geological works predating theories of plate tectonics, the United States'Catskill Delta formation is sometimes referred to as part of the Old Red Sandstone.
• By the middle of the Mississippian period, the uplift stopped, and the Acadian Mountains had been eroded so much that sediments no longer flowed across the Catskill Delta.
• The Middle Devonian to Lower Mississippian siliciclastic strata, deposited by the Catskill Delta, includes black shale, gray shale, sandstone, red beds, and minor argillaceous limestone.
• The sand-sized grains from which bluestone is constituted were deposited in the Catskill Delta during the Middle to Upper Devonian Period of the Paleozoic Era, approximately 370 to 345 million years ago.