The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and General Literature, 10. köideThomas Spencer Baynes C. Scribner's Sons, 1879 |
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Page 214
... rocks which have been discovered on any part of the globe have probably been derived from other rocks older than themselves . Geology by itself has not yet revealed , and is little likely ever to reveal , a trace of the first solid ...
... rocks which have been discovered on any part of the globe have probably been derived from other rocks older than themselves . Geology by itself has not yet revealed , and is little likely ever to reveal , a trace of the first solid ...
Page 223
... rocks as referable to two layers or magmas co - existing in the earth's crust the one beneath the other , according to their specific gravities . The upper or outer layer , which he termed the acid or siliceous magma , contains an ...
... rocks as referable to two layers or magmas co - existing in the earth's crust the one beneath the other , according to their specific gravities . The upper or outer layer , which he termed the acid or siliceous magma , contains an ...
Page 224
... rocks , and per- haps to other causes . The cold of winter and the heat of summer may be regarded as following each other in suc- cessive waves downward , until they disappear along a limit at which the temperature remains constant ...
... rocks , and per- haps to other causes . The cold of winter and the heat of summer may be regarded as following each other in suc- cessive waves downward , until they disappear along a limit at which the temperature remains constant ...
Page 225
... rocks , the conductivity must vary in different directions through the same mass , heat being more easily conducted along than across the " grain , " the bedding , and the other numerous divisional surfaces . Experiments have been made ...
... rocks , the conductivity must vary in different directions through the same mass , heat being more easily conducted along than across the " grain , " the bedding , and the other numerous divisional surfaces . Experiments have been made ...
Page 227
... rocks of the earth's crust we have abundant proof that the whole fauna and flora of the earth's surface have passed through numerous cycles of re- volution , species , genera , families , appearing and disappear- ing many times in ...
... rocks of the earth's crust we have abundant proof that the whole fauna and flora of the earth's surface have passed through numerous cycles of re- volution , species , genera , families , appearing and disappear- ing many times in ...
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Common terms and phrases
abundant acid ancient angle appear augite axis basalt beds carbonic carbonic acid centre century character chemical coal coast cone consists contains crust crystalline crystals deposit distance district earth equator eruption existence feet felspar fissures formations fossils Gaelic Galatia gallic acid galls galvanometer Gaur gelatin gems geological globe gneiss granite Greek heat hornblende igneous igneous rocks important iron islands known lake land latitude lava less lime limestone longitude mass materials meridian metamorphic miles mineral mountain observed obtained occur ocean organic original orthoclase parallel Paris passing period plane portion present pressure produced quartz regions remains rise river rocks Roman round sand sandstone schists Scotland sediment shales side siliceous Silurian sometimes species specific gravity square miles stones strata stream structure substance surface temperature thickness tion town traced upper vapour vertical volcanic voyage whole