Sentence examples for a layer of sedimentary from inspiring English sources

The rocks of the Carolina slate belt, including the Haile gold mine, contain the metal in an unusual form: rather than appearing in veins and nuggets, it is finely disseminated in a layer of sedimentary rock.The sediments that form the Carolina slates were once a seabed through which volcanic fluids flowed.

It is the youngest of the many Animikie layers, a layer of sedimentary rocks.

It sits on a historic bed of volcanic and plutonic sedimentary rock (rock formed within the Earth) that in turn sits on top of a layer of merged sedimentary and metamorphic rock.

The caldera is underlain by a layer of volcaniclastic sedimentary rock from the Mesozoic era coalesced with intrusive and volcanic rocks of Tertiary age, over a layer of Precambrian-Triassic sedimentary and metamorphic rock formed from later plutons (magma intrusions).

Excavations in 1981 yielded more complete human skeletons from the sixth stratum (a layer of internally consistent sedimentary soil or rock) which were radiocarbon dated from associated charcoal samples to 16,000 BP.

The Karoo (Karroo) System a thick layer of sedimentary rocks consisting of shale, sandstone, and grit of Permian and Triassic age (about 200 to 300 million years old)—covers the Zambezi valley and the valleys of its tributaries from Hwange (formerly Wankie) southward to Bulawayo and spreads across parts of the southern Lowveld from Tuli, near the southern border, to the Sabi River.

One of the major principles of stratigraphy is that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.

The boundary was marked in North America by a widespread layer of black sedimentary rocks covering the bones of many large fauna (including mammoths); such remains were not found above the layer.

A new analysis of spacecraft photography of Mars appears to show that in its earliest history, much of the planet was a land of lakes and shallow seas and that this left distinct layers of sedimentary rock where a fossil record of Martian life, if it ever existed, is most likely to be preserved.

For the past two months, the Opportunity has slowly examined layers of sedimentary rocks within a 430-foot-wide crater nicknamed Endurance.

B3 Neediest Cases B4 FASHION B10 ARTS E1-10 SPORTS D1-8 OBITUARIES C22-23 SCIENCE TIMES F1-14 Signs of Ancient Martian Seas A new analysis of spacecraft photography appears to show that in its earliest history, Mars had lakes and shallow seas, and that these left layers of sedimentary rock where a fossil record of life, if it ever existed, is most likely to be preserved.