concretionary horizon

Смотреть что такое "concretionary horizon" в других словарях:

• Wenlock Group — (Wenlockian), in geology, is the middle series of strata in the Silurian (Upper Silurian) of Great Britain. This group in the typical area in the Welsh border counties contains the following formations: Much Wenlock Limestone Formation, 90 300 ft …   Wikipedia