Download or read book The Sioux Quartzite and Certain Associated Rocks written by Samuel Walker Beyer and published by . This book was released on 1895 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Sioux Quartzite and Certain Associated Rocks written by Samuel Walker Beyer and published by . This book was released on 1896 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Sioux Quartzite and Certain Associated Rocks A Thesis Etc With Sketch maps written by Samuel Walker BEYER and published by . This book was released on 1895 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Sioux Quartzite and Certain Associated Rocks written by Arthur Gray Leonard and published by . This book was released on 1896 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Sioux Quartzite and Certain Associated Rocks by Samuel Walcker Beyer written by Samuel Walker Beyer and published by . This book was released on 1896 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shorter Contributions to the Geology of the Sioux Quartzite early Proterozoic Southwestern Minnesota written by and published by . This book was released on 1984 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pre Cambrian Geology of North America written by Charles Richard Van Hise and published by . This book was released on 1909 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin written by and published by . This book was released on 1909 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Official Documents Comprising the Department and Other Reports Made to the Governor Senate and House of Representatives of Pennsylvania written by and published by . This book was released on 1897 with total page 1406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Circular South Dakota Geological Survey written by South Dakota Geological Survey and published by . This book was released on 1919 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Paleomagnetism of the Early Proterozoic Sioux Quartzite Southwestern Minnesota implications for Correlating Quartzites of the Baraboo Interval written by Val W. Chandler and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paleomagnetic studies were conducted on the Early Proterozoic Sioux Quartzite, one of the so-called "Baraboo interval" red-bed sequences of the Lake Superior region. A total of 158 samples were collected from 17 sites scattered across four basins (Cottonwood County, New Ulm, northern Pipestone, and southern Pipestone) in southwestern Minnesota. Alternating-field and thermal demagnetization studies indicate that the magnetization is dominantly single component, and that the magnetic carrier is hematite. Hematite occurs both as a diagenetic mineral whose long paragenetic history began shortly after deposition and as veinlets that formed during a strain event possibly related to regional tilting. The magnetization is tentatively interpreted to have occurred before regional tilting, although a definitive fold test is difficult because dips are low. Measured paleomagnetic directions at both site and basin levels show good clustering, and the average directions obtained from each of the four basins are not significantly different at the 95 percent confidence level. The good clustering at all levels of sampling indicates that the Sioux Quartzite was magnetized either within a short time interval or during a period of subdued apparent polar wander. The structurally corrected paleomagnetic directions from the four basins yield a combined paleopole location at 1 01 ° W. and 16° N. (k=65, alpha 95=11 °). Dated paleopoles for Early Proterozoic rocks in North America and age dates of rocks interpreted to underlie the Sioux Quartzite imply that its age is 1,700-1,650 Ma. This interval corresponds in part with the age of 1,800-1,630 Ma of the Central Plains orogen, which lies some 200-300 kilometers south of the Sioux Quartzite out- crop. Quartzite may reflect a tectonic pulse related to the Central Plains orogen. Preliminary paleomagnetic data on Baraboo-interval quartzites from Wisconsin indicate that the Sioux paleopole cannot be distinguished at the 95 percent confidence level from that of the Barren Quartzite, but that it differs from that of the Baraboo Quartzite, which on the basis of existing apparent polar wander data could be as much as 100 million years older. The paleomagnetic data support previously raised cautions that some Baraboo interval quartz arenites may have been deposited in separate basins at significantly different times.

Download or read book Johns Hopkins University Circulars written by Johns Hopkins University and published by . This book was released on 1912 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Circulars written by Johns Hopkins University and published by . This book was released on 1913 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Johns Hopkins University Circular written by Johns Hopkins University and published by . This book was released on 1913 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes University catalogues, President's report, Financial report, registers, announcement material, etc.

Download or read book The Journal of Geology written by and published by . This book was released on 1899 with total page 874 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1893-1923 includes section: "Reviews."

Download or read book Report of the President of the Johns Hopkins University Baltimore Maryland written by Johns Hopkins University and published by . This book was released on 1896 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report of the President of the Johns Hopkins University Baltimore Maryland written by and published by . This book was released on 1896 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: