Only in the coldest regions does water remain frozen throughout the winter. Back to top G gabbro A dark, coarse-grained intrusive igneous rock. Schist and gneiss often have tiny, glassy red garnet dodecahedrons. A branch of geology and geography that studies the development of landforms. A long-lived sheet or mass of ice made of recrystallized snow.
Glaciers move downhill due to the stress of their own weight. .
Gondwana A continent formed in the Southern Hemisphere during the Late Paleozoic. It included most of South America, Africa, India, Austrailia, and Antarctica. . An elongate block of rock down-dropped along roughly parallel faults . A sediment layer with a gradation of grain size from large grains to finer grains. Quartz , plagioclase feldspar and potassium feldspar make up most of the rock and give it a fairly light color.