Radiometric ages of Tennessee rocks

Technical Report · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6219159

Corgan, J X; Bradley, M W

This report compiles and summarizes all known radiometric age determinations based on bedrock samples from Tennessee. Data are available for 89 sites. Specimens record both igneous and metamorphic events ranging in age from 1.3 billion to 220 million years before present. Tennessee rocks have been dated by techniques that measure the results of four different kinds of radioactive decay: thorium-lead, uranium-lead, potassium-argon, and rubidium-strontium. Most determinations meet normal scientific standards for reliability. This study focuses on clarifying published data by bringing together geochemical, geological, and geographical information for each site. In addition to data on the age of bedrock samples, this study presents basic information on the ages of meteorites from Tennessee and on the ages of sediments and organic remains from Ice Age fossil sites and more recent archeological sites. While bedrock ages are the thrust of the report, other kinds of absolute age determinations are briefly discussed. 98 references, 11 figures, 3 tables.

• Research Organization: Austin Peay State Univ., Clarksville, TN (USA). Dept. of Geology
• OSTI ID: 6219159
• Report Number(s): NP-4901796; ON: TI84901796
• Resource Relation: Other Information: Tennessee Division of Geology Bulletin No. 82
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ROCKS
ISOTOPE DATING
ARGON ISOTOPES
DATA COMPILATION
FOSSILS
LEAD ISOTOPES
METEORITES
POTASSIUM ISOTOPES
RUBIDIUM ISOTOPES
STRONTIUM ISOTOPES
TENNESSEE
THORIUM ISOTOPES
URANIUM ISOTOPES
ACTINIDE ISOTOPES
AGE ESTIMATION
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
DATA
FEDERAL REGION IV
INFORMATION
ISOTOPES
NORTH AMERICA
NUMERICAL DATA
USA
580100* - Geology & Hydrology- (-1989)
400103 - Radiometric & Radiochemical Procedures- (-1987)