George D. Louderback

Basin range structure of the Humboldt region

Introduction The existence of mountain ranges in western America formed by the tilting or relative uplifting of great blocks of the earth’s crust, acting as comparatively rigid masses, with subordinate or no flexing or folding of the strata, was first pointed out by G. K. Gilbert in 1873.* He presented and discussed a number of sections and descriptions of ranges in Utah and eastern Nevada, showing the futility of any folding and denudation hypothesis, and the applicability of the notion of origin by faulting. As the ranges of the Great basin form a rather distinct geographical system, and as the faulted block structure was supposed to be the prevailing type, Gilbert discussed it as the structure of the Basin Range system. Not long afterward, Powell, † in outlining the different types of mountain origin, described the formation of mountains by the tilting of faulted blocks as the “Basin Range type.” . . .

The Mesozoic of Southwestern Oregon

THE LITHOLOGIC CHARACTERS OF THE SEDIMENTARY ROCKS. The lower series. General composition. The sandstones. The shales. Conglomerates. Cherts. Limestone. The upper group. General composition and comparison with lower series. Shales. Sandstones. Conglomerates. THICKNESS OF THE SEDIMENTS. The upper division. The lower division. PALEONTOLOGIC CHARACTERS. The upper division. The lower division. TERMS USED. Definition of the Myrtle group or series. The Dillard series.

Proceedings of the Fifteenth Annual Meeting of the Cordilleran Section of the Geological Society of America, held at Seattle, Washington, May 21 and 22, 1914

SESSION OF THURSDAY, MAY 21 The Fifteenth Annual Meeting of the Cordilleran Section of the Geological Society of America was held in conjunction with the Pacific Association of Scientific Societies, at the University of Washington, Seattle, Washington, May 21 and 22, 1914, in room 3, Science Hall. In the absence of the chairman, the meeting was called to order at 10.15 a. m. by the secretary of the section. Prof. A. C. Lawson was elected temporary chairman. It was voted that the business session be held at 1.30 p. m., and that the morning be devoted to the reading of scientific papers. The secretary reported that the nominations sent in by mail were too scattering to definitely indicate a nomination for chairman for the ensuing year, and moved that a nominating committee be appointed to report at the business session. The motion was seconded and carried and the temporary chairman . . .

PROCEEDINGS OP THE NINETEENTH ANNUAL MEETING OF THE CORDILLERAN SECTION, HELD AT PASADENA, CALIFORNIA, JUNE 19-22, 1919.

Session of Thursday, June 19 The nineteenth annual meeting of the Cordilleran Section of the Geological Society of America was held, in conjunction with the Pacific Division of the American Association for the Advancement of Science, at Throop College of Technology, Pasadena, California, on June 19 and 20, 1919. The meeting was called to order at 10.20 a. m., June 19. In the absence of the regular officers, Dr. B. L. Clark was elected temporary chairman and G. D. Louderback Acting Secretary. ANNOUNCEMENTS The Acting Secretary reported that, due to the absence of the Secretary in Central America, the chairman had appointed him Acting Secretary to prepare the program and make arrangements for the Pasadena meeting. It was voted that the Friday meeting should be called at 9.30 a. m., in Room 205, Pasadena Hall. It was also voted to postpone the business meeting to Friday noon. The following paper. . .

Proceedings of the Thirteenth Annual Meeting of the Cordilleran Section of the Geological Society of America, held at Stanford University, California, April 5, 1912

Session of Friday, April 5 The thirteenth annual meeting of the Cordilleran Section was held in conjunction with the Pacific Association of Scientific Societies at Stanford University, April 5, 1912. The first session was called to order at 10.15 a. m., in room 334, Geology Building, by the chairman of the section, Prof. A. C. Lawson. The minutes of the twelfth annual meeting were read and approved. RESOLUTIONS CONCERNING NOMINATIONS AND TENURE OF OFFICE The Secretary introduced two motions concerning nominations and tenures of office of the section officers, and they were adopted without dissenting vote, as follows: 1. At the time of sending the preliminary notices of the annual meeting, the secretary of the section shall call for nominations for section offices, which members of the section may send in by mail. Prom the nominations so received a ticket shall be made and presented at the annual meeting. 2. . . .

Proceedings of the Twelfth Annual Meeting of the Cordilleran Section of the Geological Society of America, held at Berkeley, California, March 31 and April 1, 1911

Session of Friday, March 31 The twelfth annual meeting of the Cordilleran Section of the Geological Society of America was called to order in room 34, South Hall, University of California, Berkeley, at 2.15 p. m., March 31, 1911, by the chairman of the Section, Prof. A. C. Lawson. The minutes of the previous annual meeting were read and approved. ELECTION OF OFFICERS Ballot for officers for the ensuing year resulted as follows: A. C. Lawson, Chairman; George D. Louderback, Secretary; W. S. Tangier Smith, Councillor. REPRESENTATION ON THE COUNCIL The Secretary read a communication from the General Secretary concerning the proposed representation of the Cordilleran Section in the Council of the Society, in particular raising certain objections to the plan proposed by the Section, and asking for a more definite statement of the Section’s attitude and wishes in the matter. After considerable discussion, the Section, by unanimous vote, instructed . . .

Proceedings of the Fourteenth Annual Meeting of the Cordilleran Section of the Geological Society of America, held at Berkeley, California, April 11 and 12, 1913

Session of Friday, March 25 The eleventh annual meeting of the Cordilleran Section of the Geological Society of America was called to order in room 35, South Hall, University of California, Berkeley, at 10.30 a. m., March 25, 1910, by the chairman of the section, Prof. A. C. Lawson. The minutes of the previous annual meeting were read and approved, except that “ninth” annual was ordered changed to “tenth” annual, the ninth annual meeting having been held at Albuquerque, New Mexico, in conjunction with the general Society. ELECTION OF OFFICERS The officers of the section were reelected for the ensuing year: A. C. Lawson, Chairman; 6. D. Louderback, Secretary; G. K. Gilbert, Councilor. The section then passed to the reading of scientific papers, and the following were presented in the order given: LIMESTONE PLAINS OF THE INTERIOR OF BAHIA BY J. C. BRANNER ( Abstract ) Limestones, probably of Jurassic age, cover . . .