The shallow soils are derived from fluvial gravel overlain by multiple Holocene volcanic ash deposits and aeolian dust. |
These mid-Palaeozoic formations are unconformably overlain by the Carboniferous-Permian Pillahuinco Group. |
The dorsal ligament groove is overlain dorsally and flanked laterally by the nacreous middle shell layer. |
The Moine rocks are overlain unconformably by post-Caledonian, Old Red Sandstone sedimentary rocks. |
Most deep-sea trenches in the Pacific are floored by normal basaltic oceanic crust overlain by pelagic sediments and ash. |
That unconformity is overlain by sandstones of the Puentelles Formation, dated as late Kasimovian based on its fossil flora. |