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Chink-Faceted Pebbles: Fluviatile versus Marine

Chink-faceted pebbles were first identified as due to restricted abrasion of smaller pebbles and rock fragments between the larger and more stable boulders of coarse beach deposits. Similar pebbles were later found in stream channels in special situations where restricted mutual rubbing was favored.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

The System CaSiO₃-CaAl₂Si₂O₈-NaAlSiO₄

Phase equilibria at high temperatures have been investigated experimentally in the system CaSiO₃-CaAl₂Si₂O₈-NaAlSiO₄.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Age Relationships of Intrusive Rocks and Ore Deposits in the Red Lake Area, Ontario

The intrusive rocks of the Red Lake area are all of post-Timiskaming age. They have been divided into three general ages of intrusion-early pre-Algoman, late pre-Algoman, and Algoman-and into several subdivisions.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Mafic and Ultramafic Rocks of the Baie Verte Area, Newfoundland

The paper discusses the field relations, petrography, and chemical compositions of a group of igneous rocks characteristic of geosynclinal belts: namely, greenstone, ultramafics, and gabbro, which occurs in the northeastern extremity of the Appalachians in the vicinity of Baie Verte, Newfoundland.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Sheet Structure in Granites: Its Origin and Use as a Measure of Glacial Erosion in New England

Evaluation of the possible causes of the structure indicates that relief, through removal of superincumbent load, of a primary confining pressure is chiefly responsible for the large-scale exfoliation phenomena involved.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

A Metric Grade Scale for Sedimentary Rocks

Studies of thin sections of sedimentary rocks, in investigations of rock fades, reveal that there is no available grade scale designed especially for two-dimensional measurements of grain size, roundness, etc.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Bird's-Eye Coal from Greymouth, New Zealand

Excellent examples of bird''s-eye coal from the Tertiary bituminous coal measures of Greymouth, New Zealand, are described. The "eyes" consist of concentric rings, each ring a miniature ridge with slopes directed radially in opposite directions from the crest line of the ridge.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Disintegrating Soil Slips of the Coast Ranges of Central California

On relatively gentle slopes of the Coast Ranges of central California the debris involved in soil slips frequently breaks up into clods immediately after slipping has started, instead of remaining together and forming a bulging tongue.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

Structure and Origin of Black Hills Pre-Cambrian Granite Domes

The pre-Cambrian granite masses of the southern Black Hills are regarded as protrusions through the schistose sedimentary cover from a batholithic mass below. The granites of the Harney Peak area are a composite of many sills, tongues, dikes, and irregular masses of various compositions and ages.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘

The Preglacial Teays Valley in Indiana

The preglacial Teays River, which rose in Tertiary time in the vicinity of the Blue Ridge in North Carolina, flowed across north-central Indiana and turned south through the present lower Wabash Valley to discharge its water into the Gulf Embayment in the vicinity of the southern tip of Illinois.

出版机构:University of Chicago

刊物名称:The Journal of Geology

出版时间:1943

ISSN:0022-1376

数据源:报刊文摘