The cower unit of the eagle is a wellsorted lithic and glauconitic marine sandstone .
伊格尔砂岩的下部单元是分选良好的岩屑质和海相海绿石质。
Later , on the basis of local lithic culture , the iron and bronze cultures of central asia all absorbed elements from indo-europeans who migrated from the north shore of the black sea and caspian sea .
On the basis of the studies of paleoenvironment during the late pleistocene and the early holocene in east asia and north america , it is suggested that microblade remains might have represented a lithic technology which occurred in extremely diversified environments .