In the distant past, pressures in the Earth’s crust squeezed and pressed granitic rocks into flattened plates called metamorphics. This type of rock can be seen between Silverplume and Floyd Hill. We ...
Apatite fission track ages ($137 \pm 8$ to $92 \pm 7 Ma$) and mean etchable track lengths ($12.1 \pm 1.8$ to $12.9 \pm 1.3 \mu m$) are reported for 10 sandstones from the Breathitt Formation (middle ...
THE National Antarctic Expedition is to be congratulated upon the care and promptitude with which its scientific collections are being worked out by the staff of the Natural History Museum. The ...
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