marker horizon in a sentence

marker horizon meaning in Hindi


  1. The site is important as the type locality of the Botany Limestone, a widespread marker horizon that is key to an understanding of the stratigraphy of the Namurian sediments of the North Pennines and Northumberland Trough.
  2. Iridium layers are associated with bolide impacts and are not unique, but when occurring in conjunction with the extinction of specialised tropical planktic foraminifera and the appearance of the first Danian species, signal a reliable marker horizon for the Cretaceous Paleogene boundary.
  3. Like the Imbrium and Orientale Basins on the Moon, Caloris Basin is surrounded by an extensive and well-preserved ejecta blanket As on the Moon, where ejecta from the better preserved basins was used to construct a stratigraphy, the ejecta from the Caloris Basin also can be used as a marker horizon.
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