A formation of marekanite at El Fiscal, Guatemala
By: Ljunggren, Pontus
.
Material type: 
ArticleDescription: 49-52p ; Illustration.Subject(s): Formation - Marekanite - El Fiscal - Guatemala | Petrology | Obsidian pebbles
In:
Geological magazine : Vol 97 Iss. 1-6 Year. 1960Summary: Abstract
An outcrop of obsidian pebbles in a grey volcanic rock was investigated in the field and subsequently examined in the laboratory by means of optical, X-ray, and D.T.A. methods. The results show that the grey rock arose from obsidian through a micro-cracking, causing a formation of marekanite balls (massive obsidian) surrounded by a very brittle grey rock (micro-cracked but completely unaltered volcanic glass).
| Item type | Current location | Collection | Call number | Status | Date due | Barcode |
|---|---|---|---|---|---|---|
Article
|
Library and Information Centre Periodical Section | Bound Journal Collection | Not for loan | 002545_05 | ||
Serials/Scientific Journal
|
Library and Information Centre Periodical Section | Bound Journal Collection | 550 GEO (Browse shelf) | Damaged | 002545 |
Abstract
An outcrop of obsidian pebbles in a grey volcanic rock was investigated in the field and subsequently examined in the laboratory by means of optical, X-ray, and D.T.A. methods. The results show that the grey rock arose from obsidian through a micro-cracking, causing a formation of marekanite balls (massive obsidian) surrounded by a very brittle grey rock (micro-cracked but completely unaltered volcanic glass).
There are no comments for this item.