Word: stratas
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Reassured by this stability, Dr. John Graham and a team of Carnegie geologists went to work. A series of rock samples 10 million to 100 million years old which they took from flat-lying strata in the western U.S. proved to have a magnetism pointing in about the same direction as present-day compass needles. The conclusion was that when the rocks were laid down as silt, the earth's magnetic field was about as it is today...
...micro-meteorites floating gently down, said Whipple, may be the only specimens available of "interstellar solids." Geologists should look for micro-meteorites, Whipple said, in places like the Cretaceous chalk beds. Many astronomers believe that a planet blew up fairly recently; if so, there ought to be strata rich in its micrometeorite fragments to date the explosion...
...which now number seven and embrace an astonishingly wide reach of British life and customs. There are as many distinctive social classes in Britain as there are regions in the U.S., and most British novelists, no matter how imaginative and observant, are as incapable of portraying life in any strata other than their own as, say, a Brooklyn-bred novelist would be of showing how a tree grows in Independence, Mo. But the novels of Henry Green, which are still little known in Britain and almost unheard of in the U.S., bubble like a social melting pot that can boil...
...moved and the bed of a nearby stream had to be deepened. The postmaster kept copious records of every move the mountain made. Geologists decided that it was caused by a "laccolith," a mass of molten material that had forced its way toward the surface, raising local rock strata instead of breaking through them...
...mass of meteoric material that plunged into the earth at enormous speed and exploded like a bomb. The piles of rock in the rim are fractured as if they were blown out of the depression. The undisturbed rock layers of the region are horizontal, or nearly so, while the strata near the crater dip downward from the rim. The geologists found no meteoric iron, but they did find chunks of peculiar rock containing 3% of nickel that may have been part of a "stony" meteor...