- 標(biāo)準(zhǔn)層
下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
marker horizon中文什么意思
百科釋義
Marker horizons or chronohorizons or marker beds are stratigraphic units of the same age and of such distinctive composition and appearance, that, despite their presence in separate geographic locations, there is no doubt about their being of equivalent age (isochronous) and of common origin. Such clear markers facilitate the correlation of strata, and used in conjunction with fossil floral and faunal assemblages and paleomagnetism, permit the mapping of land masses and bodies of water throughout the history of the earth.
詳細(xì)百科解釋