Sentences with phrase «in ancient sedimentary rocks»

Researchers focused on the cycle of sulfur and simulated the patterns in which three different isotopes of sulfur could combine in ancient sedimentary rocks.

The metals» solubility depends strongly on the amount of oxygen present, so the amount and type of those metals in ancient sedimentary rocks reflect how much oxygen was in the water long ago, when the sediments formed.

Not exact matches

The graptolites built many theca together to form a branching structure that then drifted in ancient seas and therefore can be found in sedimentary rocks of a certain vintage all around the world.

NASA's Mars Exploration Rovers have enabled us to examine 3.5 - to 4 - billion - year - old sedimentary rocks on Mars, in much the same way that we study ancient strata on Earth.

However, ancient zircon crystals in sedimentary rocks provide evidence that our planet had liquid oceans, at least intermittently, during this earliest period.

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.

One of the few things experts all agree on is where to conduct the search: in the three far - flung provinces that host the world's most ancient sedimentary rocks.

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.