Sentences with phrase «sedimentary rocks deposited»

«Dinosaur remains from the Arabian Peninsula and the area east of the Mediterranean Sea are exceedingly rare because sedimentary rocks deposited in streams and rivers during the Age of Dinosaurs are rare, particularly in Saudi Arabia itself» says Dr Tom Rich from Museum Victoria in Australia.

While conducting paleontological research in northeastern Mexico, the scientists came upon sedimentary rock deposited toward the end of the Cretaceous Period that evidenced an enormous diversity of fossils, including the tracks of birds, dinosaurs and pterosaurs.

Not exact matches

The deposit is bounded by the Eastern Graben Fault, a major structure that separates the Oligocene age sedimentary and volcanic rocks to the west from Mesozoic metamorphic basement rocks to the east.

The occurrence of sedimentary basement rocks at shallow levels beneath the gold workings also presents a target for high - grade mineralization proximal to the basement unconformity, similar in style to the Hishikari deposit in Kyushu.»

It is sedimentary rock, a limestone born from the deposits of sediments in a marine environment.

Certain kinds of sedimentary rocks, called Burgess Shale - type (BST) deposits, have the right characteristics to preserve soft - bodied organisms as thin carbon films.

At the time, these hydrocarbon - rich areas were marine coastal margins, where the productivity of marine algae was generally high and sedimentary rocks were thickly deposited.

«From now on, continues Castelltort, we know that by calculating the ratio between 13C and 12C sampled in similar slope deposits close to continents, we can have an indication of the sea level, which means it's possible to better predict the distribution of sedimentary rocks in our subsurface.»

Sedimentary rock such as sandstone and shale, created from layers of deposited material, does an especially good job of preserving animal and plant remains.

The fossil was recovered from sedimentary rock strata that were deposited in an ancient lake roughly 55 million years ago, during the early part of the Eocene epoch.

The Tava sandstone is unusual for another reason: It may be the only large - scale deposit in the world where sedimentary rocks such as sandstone have been injected into crystalline rocks such as granite, Siddoway says.

The fine layers of sedimentary rocks the rover detected the mineral on, however, showed evidence that they may have been part of lakebed deposits.

Sedimentary rocks consist of layers of materials that are deposited over time.

An alluvial fan is a pattern of sedimentary rocks, dirt, and sand deposited by flowing water â $ «in this case, perhaps an ancient Martian river.

[4] The alluvial deposits from these rivers are generally a few hundred feet (30 metres) thick and lie over Pleistocene and Pliocene sedimentary rocks.

They found that the diatom - rich sediments, deposited during the warm intervals, were predominantly composed of material from one terrane - the Jurassic to Cretaceous volcanic rocks and associated sedimentary rocks of the Ferrar Large Igneous Province (FLIP).

Sedimentary marine source rocks that generate oil and gas were deposited in time frames of millions of years.

The great sedimentary bowl is one of the world's thickest deposits of rocks, oil, and natural gas production.