|
| << previous | next >> |
Journal description
All volumes of the corresponding journal
All issues of the corresponding volume
All articles of the corresponding issues
Details for article 13 of 14 found articles
| Title: |
The oldest abundant volcanic glass on Earth |
| Author: |
Hamilton, L. H. |
| Appeared in: |
Australian journal of earth sciences |
| Paging: | Volume 39 (1992) nr. 1 pages 55-59 |
| Year: |
1992-02 |
| Contents: |
The oldest abundant volcanic glass on Earth occurs in a Carboniferous ignimbrite in the region of Port Stephens, NSW. The K-Ar age of 332 ± 4 Ma on biotite is consistent with the geological relations and establishes a Carboniferous age for the glass. The glassy nature has been established by X-ray diffraction and electron diffraction. Although Palaeozoic glass is relatively rare it appears that locally abundant glass occurs in felsic ignimbrite of Permian and Carboniferous age at several places in Australia and Europe. Apart from a minor occurrence of Precambrian glass in a dyke apophysis there appears to be no well established occurrence of pre-Carboniferous volcanic glass on Earth. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 13 of 14 found articles
| << previous | next >> |