Sentences with phrase «in black shales»

The osmium isotope evidence found in black shales correlates with higher continental weathering as a result of oxygen in the atmosphere.

Not exact matches

The Marcellus Shale, also referred to as the Marcellus Formation, is a Middle Devonian - age black, low density, carbonaceous (organic rich) shale that occurs in the subsurface beneath much of Ohio, West Virginia, Pennsylvania and New York.

Originally constructed in the 1820's, the earliest settlers of Le Roy built the Creekside from black Marcellus shale dug from the Oatka Creek bed.

Permian - Triassic boundary in shallow marine sediments, characterised by a significant sedimentation gap between the black shales of Permian and dolomites of Triassic age.

In keeping with the naming of its living relative (after an Eastern Cape river), the species name of the new fossil form, kowiensis, is after the Kowie River which rises among the hills where it was found, and the genus name, Serenichthys, honours Serena Gess, who provided land for the storage of more than 70 tons of black shale rescued from roadworks for ongoing research — in which all the new material was founIn keeping with the naming of its living relative (after an Eastern Cape river), the species name of the new fossil form, kowiensis, is after the Kowie River which rises among the hills where it was found, and the genus name, Serenichthys, honours Serena Gess, who provided land for the storage of more than 70 tons of black shale rescued from roadworks for ongoing research — in which all the new material was founin which all the new material was found.

Interspersed in the red stone were narrow bands of black shale containing petrified fish, from a time when a deep lake covered the area.

In the new paper, researchers analyzed the same black shales for the relative abundance of an additional element: osmium.

To find out whether acid rain was indeed the problem, the team focused on one problematic sliding layer in the Jiweishan avalanche: a thin bed of black shale, which contains slippery clay minerals such as talc, in addition to fine organic material and calcite, which helps cement the shale together.

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The model also shows that the presence of seafloor anoxia, as suggested by black - shale deposition in the proto - North Atlantic Ocean before the event, might be the result of the silled shape and lack of deep - water formation of this basin at the Late Cretaceous.

Lumpus must first reveal how Spookydontid albedo and black carbon optical depth footprints have evolved since his debut alongside Hallucigenia sparsa in the Burgess shale

But, as would be expected from their origins in the earth's orbital cycles, the Milankovitch rhythms were present long before that, and can be seen as cycles of deep - sea anoxia: T. D. Herbert and A. G. Fischer, «Milankovitch climatic origin of mid-Cretaceous black shale rhythms in central Italy.»

He was especially interested in learning why black shales, including the Marcellus, had a natural fracture pattern different from that of any other rock.

He said health hazard protocols can provide information on what the safe level of black shale particles can be present in well water.