The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 168
... rock , yet many granite outcrops are high- ly polished as the result of the passage of glacier ice . Other rocks ... rock outcrops . Deter- Striations are scratches on a rock surface , and when the mination orientations of a sufficient ...
... rock , yet many granite outcrops are high- ly polished as the result of the passage of glacier ice . Other rocks ... rock outcrops . Deter- Striations are scratches on a rock surface , and when the mination orientations of a sufficient ...
Page 170
... rocks were more susceptible to glacial erosion than those in which no basins occur . There is reason to believe that both explanations ac- count for the alternating rock steps and rock basins that characterize the longitudinal profile ...
... rocks were more susceptible to glacial erosion than those in which no basins occur . There is reason to believe that both explanations ac- count for the alternating rock steps and rock basins that characterize the longitudinal profile ...
Page 175
... rock or soil , just as water oc- cupies the pores of natural materials in nonpermafrost areas . Ice segregations are seams or irregular - shaped pure ice masses that form by the drawing of water into the permafrost layer from below ...
... rock or soil , just as water oc- cupies the pores of natural materials in nonpermafrost areas . Ice segregations are seams or irregular - shaped pure ice masses that form by the drawing of water into the permafrost layer from below ...
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