 ... at the base of the hill), is strictly controlled in form by a small elliptical stock of alkaline syenite cutting the softer diorites. Apart from other more general considerations, the fact that these eruptive rocks are more resistant to weather than...  Bulletin of the United States Geological Survey - Seite 7von Geological Survey (U.S.) - 1903Vollansicht - Über dieses Buch
 | 1903 - 898 Seiten
...eruptive rocks are more resistant to weather than the surrounding schists is clear from the nature of the slopes and profiles at the contacts. As a rule...is seen at the beautiful "Crystal Cascade" on the southwest side of the main mountain. This general feature of the residuals of erosion in our area may... | |
 | Herdman Fitzgerald Cleland - 1903 - 594 Seiten
...eruptive rocks are more resistant to weather than the surrounding schists is clear from the nature of the slopes and profiles at the contacts. As a rule...is seen at the beautiful "Crystal Cascade" on the southwest side of the main mountain. This general feature of the residuals of erosion in our area may... | |
 | 1902 - 982 Seiten
...eruptive rocks are more resistant to weather than the surrounding schists is clear from the nature of the slopes and profiles at the contacts. As a rule...gradient in the streams draining the mountain, as if coi'rasion were considerably easier on the schists than on the eruptive rocks. An example is seen at... | |
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