Holocene climatic variations—Their pattern and possible cause

Eustatic changes in sea level

http://cavereserve.org/resources/publications-burneys/Burney%20et%20al%202004%20chronology%20madagascar.pdf

A chronology for late prehistoric Madagascar.

This list contains dates related to the chronology of the last glaciation in Europe. Since several of the older results which already have appeared in print need correction or re-interpretation it was considered necessary to incorporate as many of them as possible into this list. It is noteworthy that, although the interpretation may have changed slightly, most of those measurements are still as valid today as they were eight years ago.

/pdf/groningen-radiocarbon-dates-x-4ftp34gg07.pdf

Groningen Radiocarbon Dates X

An Ecological History of the Lake Victoria Basin

It has been brought to our attention that wedid not designate the correct collectors of severalof the samples reported in "Lamont radiocarbonmeasurements III" [ Science 124, 154 (27 July1956)] The following list gives the proper collectors for several samples in Table 4 under V Arcticstudies : L192B, R D Cotell (1952); L261A,B,C,G Hattersley-Smith (1953); L254A, L248A, R LChristie (1954); L254B,C,D, E W Marshall(1954); and L248B, G Hattersley-Smith and AP Crary (1954)

https://science.sciencemag.org/content/sci/126/3287/1324.full.pdf

Lamont Natural Radiocarbon Measurements III

Multiple differential thermal analysis

Age from metamict minerals

The helium and uranium content of a number of specimens of marble, Iceland spar, and fossil shell of known age were determined. The sedimentary calcite specimens contained only a small fraction of the helium expected, indicating that most of the uranium is external to the lattice. The marbles, in contrast, conthined much more helium than was calculated from the age and the alpha activity. The helium and uranium content of a number of specimens of marble, Iceland spar, and fossil shell of known age were determined. The sedimentary calcite specitnens contained only a small fraction of the helium expected, indicating that most of the uranium is external to the lattice. The marbles, in contrast, contained much more helium than was calculated from the age and the alpha activity. This appears related to the gaseous inclusions in these materials. (auth)

Helium in limestone and marble

The intrusives at Santa Rita and near-by Hanover differ widely in the extent of hydrothermal alteration. The Santa Rita intrusive is in many places highly kaolinized, sericitized, and silicified. The Hanover intrusive is to a large degree unaltered. The study has centered around the hydrothermal alteration of the intrusive and to a lesser degree, alteration in dikes and sills in the vicinity. On the basis of field and laboratory criteria, four stages of alteration in the Santa Rita intrusive have been selected: (1) Areas of negligible alteration; (2) Areas of significant visible changes in the feldspars and ferro-magnesian minerals; (3) Areas of argillic alteration; and (4) Areas of sericitization and silicification. Comparison of ore distribution with alteration indicates that the highest concentration of copper is in general related to Stage 3. Secondary enrichment of chalcocite has contributed to the formation of ore in the argillic area, but some chalcocite may have been originally introduced with the argillic alteration of the Santa Rita intrusive. Comparable copper deposition has not been observed in the Hanover intrusive. A considerable amount of oxidation occurs in some portions of the deposit, and areas near the surface have been extensively leached, but the change in alteration minerals previously formed appears minor. Studies at Santa Rita indicate the utility of applying zones of alteration in field mapping, to outline areas of greater and lesser promise from the standpoint of mineralization. Data of considerable aid to the general projection of a drilling program are also developed.

J. L. Kulp

Papers

Lamont Natural Radiocarbon Measurements III

Multiple differential thermal analysis

Age from metamict minerals

Helium in limestone and marble

Hydrothermal alteration at santa rita, new mexico