Mineral, chemical and isotope compositions of clay subfractions from formations of the Srednii Peninsula, Murmansk coast of the Barents Sea

Fine-grained clay subfractions (SFs) with particle size of <0.1, 0.1-0.2, 0.2-0.3, 0.3-0.6, 0.6-2.0, and 2-5 µm separated from claystone of Upper Precambrian Pumanskaya and Poropelonskaya formations on the Srednii Peninsula were studied by transmission electron microscopy, X-ray diffraction, and Rb-Sr methods. All subfractions consist of low-temperature illite and chlorite, and contribution of chlorite decreases with diminishing particle size. The crystallinity index and I002/I001 ratio increase from coarse- to fine-grained SFs. Leaching by ammonium acetate solution and Rb-Sr systematics in combination with mineralogical and morphological data indicate that illite in Upper Proterozoic claystone from the Srednii Peninsula formed during three time intervals: 810-830, 610-620, and about 570 Ma ago. The first generation of this mineral with low Rb/Sr ratio dominates in coarse-grained SFs while the second and third generations with a high Rb/Sr ratio prevail in fine-grained SFs. All of three generations are known in Poropelon claystone, whereas Puman claystone contains only illite of the first and second generations. Geological processes responsible for multistage illite evolution in claystones are discussed.

San Diego region historic wave and sea level data report : Coast of California Storm and Tidal Waves Study /

Mode of access: Internet.

Sedimentation in submarine canyons in San Diego County, California, 1984-1987 : Coast of California storm and tidal waves study /

Mode of access: Internet.

San Diego region wind transport and wave overwash report : Coast of California Storm and Tidal Waves Study /

Mode of access: Internet.

1982-1983 shoreline position study : Coast of California storm and tidal waves study /

Mode of access: Internet.

Shoreline movement investigations report : Portuguese Point to the Mexican border (1852-1982) : Coast of California storm and tidal waves study /

Mode of access: Internet.

State of the Coast Report, San Diego Region : Coast of California Storm and Tidal Waves Study, Volume II-Appendices-Final.

Final report.

Bryozoa of the Pacific coast of America.

Includes bibliographies and indexes.

A history of the Island of Newfoundland : containing a description of the island, the Banks, the fisheries and trade of Newfoundland and the coast of Labrador /

Plates of maps: Chart of the Island of Newfoundland and the coast of Labrador with part of Greenland drawn & engraved expressly for the Rev. L.A. Amadeus's History of Newfoundland; with inset Description of Terra de Baccalaos of Newfoundland by Ortelio the Spanish geographer in the year 1587; A chart of the banks of Newfoundland, drawn & engraved expressly for the Rev. L.A. Amadeus's History of Newfoundland.

Ports on the South Atlantic Coast of the United States : Morehead City, N. C., Brunswick, Ga., Port Everglades, Fla., Georgetown, S. C., Fernadina, Fla., Miami, Fla., Palm Beach, Fla. /

"Revision of Port series, no.16, T̀he port of Miami and Port Everglades, Fla.,' 1947; a revision, in part, of the Port series, no.12, T̀he ports of Wilmington and Morehead City, N.C.' 1950; and a revision, in part of Port series, no. 14, T̀he ports of Savannah and Brunswick, Ga.,' 1946."