geologist

Geologists have studied the way that heat flows from the earth.

In the 1840s American geologist James Daly observed that the different Hawaii islands seem to share a similar geologic evolution but are progressively more eroded, and therefore probable older, toward the northwest.

The oceanic volcanic islands and their hot-spot trails are thus especially useful for geologist because they record the past locations of the plate over a fixed source.

Well, some geologists now want to apply this concept to explain mineral diversity too.

After Hutton, geologists tried to determine rates of sedimentation so as to estimate the age of Earth from the total length of the sedimentary or stratigraphic record.

Alaska is fascinating to geologists because of its incredible landscapes.

At locations around the globe, geologists had found an unusually high concentration of iridium in the layer of sedimentary rocks that was formed about 65 million years ago.

Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.

Eventually, Agassiz and others convinced geologists and the general public that a great continental glaciation had extended the polar ice caps far into regions that now enjoy temperate climates.

As geologists mapped glacial deposits in the late nineteenth century, they became aware that there were several layers of drift, the lower ones corresponding to earlier ice ages.

This idea was modified in the late twentieth century, when geologists and oceanographers examining oceanic sediment found fossil evidence of warming and cooling of the oceans.

Isotopic analysis of shells allowed geologists to measure another glacial effect.

From this analysis of marine sediments, geologists have learned that there were many shorter, more regular cycles of glaciation and deglaciation than geologists had recognized from the glacial drift of the continents alone.

Actually there wouldn’t be any evidence to support his hypothesis until the 1970s, when oceanographers were able to drill deep into the seafloor and collect samples, samples which were then analyzed by geologists.

Geologists, we examine layers of sediment on the Earth’s surface to approximate the dates of past geologic time periods.

Geologists in the far future will be able to examine the sediment being laid down today, whereas right now we can say that, yes, human impact on the Earth is clear.

Until the early 1970s,most archaeologists did not consider the coast a possible migration route into the Americas because geologists originally believed that during the last Ice Age the entire Northwest Coast was covered by glacial ice.

However, at the sites of the more recent lakes, there’s only cattle fossils, additional evidence for geologists that these lakes were probably smaller, shallower, because cattle only use water for drinking.

They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers that once carried rainfall on Mars from the mountains down into the valleys.

In 1970 geologists Kenneth J. Hsu and William B.F. Ryan were collecting research data while aboard the oceanographic research vessel Glomar Challenger.

So all this leads back to my main point – you need to know about more than just rocks as geologists.

Now, we geologists thought we had a pretty good idea of how the Grand Canyon in the southwestern United States was formed.

That’s been the conventional wisdom among geologists for quite some time.

Two geologists discovered that about half of the sand from the Grand Canyon was actually once part of the Appalachian Mountains.

But that’s only useful up to a point, and that’s not what these two geologists did.