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Geology, Vol. 1 [of 3] : $b Geologic processes and their resultsSalisbury, Rollin D.

Science

Geology, Vol. 1 [of 3] : $b Geologic processes and their results

Name: Geology, Vol. 1 [of 3] : $b Geologic processes and their results
Author: Salisbury, Rollin D.

Salisbury, Rollin D.

Geology

+Alternative Views of Original Heat Distribution+                    559
      Thermal distribution on the convection hypothesis, 559. Level
      of no stress, 561. Thermal distribution on the hypothesis of
      central solidification, 562. Thermal distribution under the
      accretion hypothesis, 564. _Computed Pressures, Densities,
      and Temperatures within the Earth Based on Laplace’s Law_ 564
      Recombination of material, 568. Comparison of the hypotheses,
      568.

+Observed Temperatures in Excavations+                               569
      Explanations of varying increment, 570. The permeation and
      circulation of water, 570. Chemical action, 570. Differences
      in the conductivity of rock, 571. Compression, 571. Gradients
      projected, 571. The amount of loss of heat, 572. The amount
      of shrinkage from loss of heat, 572.

+Other Sources of Deformation+                                       574
      Transfer of internal heat, 574. Denser aggregation of
      matter, 574. Extravasation of lavas, 574. Change in the
      rate of rotation, 575. Distribution of rigidity, 578.

  _Sphericity as a Factor in Deformation_                            580
      The influence of the domed form of the surface, 581.
      Theoretical strength of domes of earth-dimensions, 581.
      Stress-accumulation independent of sphericity, 583. The
      actual configuration of the surface, 584. Concave tracts,
      584. General conclusion, 588.


                              CHAPTER X.

                       THE EXTRUSIVE PROCESSES.

      Outward movements, 590.

+Vulcanism+                                                          590
      Phases of vulcanism, 591.
    1. _Intrusions_                                                  591
      The heating action, 592.
    2. _Extrusions_                                                  592
      Fissure eruptions, 593. Volcanic eruptions, 594. Intermediate
      phenomena, 596. Lunar craters, 598.

+Volcanoes+                                                          599
      Number of, 599.
  _Distribution of Volcanoes_                                        599
      In time, 599. Relative to land and sea, 599. Relative to
      crustal deformations, 601. In latitude, 603. In curved lines,
      603.
  _Relations of Volcanoes_                                           604
      Relations to rising and sinking surfaces, 604. Relations to
      one another, 605. Unimportant coincidences, 606. Periodicity,
      607.
  _Formation of Cones_                                               608
      Lava-cones, 608. Cinder-cones, 608. Subordinate cones, 610.
      Composite cones, 610. Extra-cone distribution, 610.

+Lavas+                                                              612
      Their nature, 612. Consanguinity and succession of lavas,
      614. Temperature of lavas, 615. Depth of source, 616.

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Geology, Vol. 1 [of 3] : $b Geologic processes and their results

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