The American Journal of Science, 201. sējumsJ.D. & E.S. Dana, 1921 |
No grāmatas satura
1.–5. rezultāts no 100.
5. lappuse
... portion covers about 1100 square miles , and whose cover over broad areas consisted merely of a somewhat earlier series of extrusive andesites a few thousand feet in thick- ness . Some folding of the older sedimentary rocks seems to ...
... portion covers about 1100 square miles , and whose cover over broad areas consisted merely of a somewhat earlier series of extrusive andesites a few thousand feet in thick- ness . Some folding of the older sedimentary rocks seems to ...
6. lappuse
... portions now exposed have been uncovered through many cycles of uplift and erosion . It is especially with this group , which is illustrated in the regionally metamorphosed province of New England , and which may be called orogenic ...
... portions now exposed have been uncovered through many cycles of uplift and erosion . It is especially with this group , which is illustrated in the regionally metamorphosed province of New England , and which may be called orogenic ...
7. lappuse
... portion of the quad- rangle . Here a mountain rises to an elevation of 8200 feet , showing no igneous core , but rivalling in elevation the mountains made by the Crazy Mountain stocks and their aureole of metamorphosed sediments . This ...
... portion of the quad- rangle . Here a mountain rises to an elevation of 8200 feet , showing no igneous core , but rivalling in elevation the mountains made by the Crazy Mountain stocks and their aureole of metamorphosed sediments . This ...
8. lappuse
... portion being con- cealed than has become revealed by erosion . Another line of evidence of broader character is ... portions of what is now one of the great plateau regions of the world . Mountain ranges were raised , and crustal ...
... portion being con- cealed than has become revealed by erosion . Another line of evidence of broader character is ... portions of what is now one of the great plateau regions of the world . Mountain ranges were raised , and crustal ...
12. lappuse
... same composition . The older and thoroughly chlori- tized portions are probably only slightly older , as shown by the similarity in composition . They show that extensive 12 J. Barrell - Relations of Subjacent Igneous.
... same composition . The older and thoroughly chlori- tized portions are probably only slightly older , as shown by the similarity in composition . They show that extensive 12 J. Barrell - Relations of Subjacent Igneous.
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Ankylosaurus armor arrangement atoms augite Basin batholithic beds biotite Bull bullæ Callville canine centrum chemical Chionophila cingulum clays cliff Cretaceous crystals delta deposits depth described determinate developed Devonian diameter Earth erosion evidence fault fauna feet figure folding foramen formation fossils genera genus Geological glacial gneiss granite Holotype hypocone igneous John Day Jour later layers length limestone lower magma magnesium magnesium oxide Marsh metamorphism miles minerals Mississippian molars molecules Moon Moon's Muddy Mountains Nodosaurus occur Oligocene orbit Oreodon orientite oxide Paleozoic Permian plane plates Polacanthus portion posterior postglenoid premolars present probably quartz quartzite region ridges River rocks sagittal crest sandstone satellite schists SCI.-FIFTH SERIES sea-level sediments shale skull space groups species specimens stability Stegosaurus strata structure surface Survey symmetry terraces thick tion U. S. Geol unconformity upper valley vertebræ width Windsor zone
Populāri fragmenti
424. lappuse - And, moreover, we have found that where science has progressed the farthest, the mind has but regained from nature that which the mind has put into nature. We have found a strange foot-print on the shores of the unknown. We have devised profound theories, one after another, to account for its origin. At last, we have succeeded in reconstructing the creature that made the foot-print. And Lo! it is our own.
262. lappuse - THE ANNUAL MEETING OF THE NATIONAL ACADEMY OF SCIENCES THE annual meeting of the National Academy of Sciences will be held at the Smithsonian Institution in Washington on April 16, 17 and 18, 1917.
256. lappuse - Science and the Division of Chemistry and Chemical Technology of the National Research Council.
433. lappuse - Committees of the National Academy of Sciences, the American Association for the Advancement of Science, the...
187. lappuse - The Blue Mountains formed the eastern and southern shores of this lake, but its other limits are difficult to ascertain, as this whole country has since been deeply buried by successive overflows of volcanic rock. It is only where the latter have been washed away that the lake deposits can be examined. The discovery and first explorations in this basin were made by Rev. Thomas Condon, the present state geologist of Oregon. The typical localities of this Miocene basin are along the...
187. lappuse - ... the lake deposits can be examined. The discovery and first explorations in this basin were made by Rev. Thomas Condon, the present state geologist of Oregon. The typical localities of this Miocene basin are along the John Day River, and this name may very properly be used to designate the lake basin. The strata in this basin are more or less inclined and of great thickness. One section near the John Day River, examined by the writer in 1871 and again in 1873, seems to indicate a thickness of...
62. lappuse - Pennsylvanian rather than the Mississippian (either early or late). Again there is nothing in the collection that may be justly cited as definitely opposed to correlation of the Stanley with lower Pottsville or basal Morrow, which conclusion I reached in my 'Revision' mainly on physical and diastrophic considerations.
153. lappuse - The formations of the Chester Series in western Kentucky and their correlates elsewhere, in Part 2 of Mississippian formations of western Kentucky: Ky.
290. lappuse - Knowlton goes so far as to say that "relative uniformity, mildness, and comparative equability of climate, accompanied by high humidity, have prevailed over the greater part of the earth, extending to, or into, polar circles, during the greater part of geologic time — since, at least, the Middle Paleozoic. This is the regular, the ordinary, the normal condition.
416. lappuse - ... reclaimed; this is diked to exclude the flood-tidal and freshet waters. At New Westminster the river is confined between drift ridges or upland areas, which rise 200 to 300 feet above the river. The upland area south of the river marks the inner edge of the delta and extends from a point on the river 3! miles below New Westminster nearly straight south to Boundary Bay. The delta is bounded on the north by the highland area extending from New Westminster nearly west to Point Grey. In its seaward...