Australian Museum Journal Notes on a collection of igneous rocks from Lord Howe Island
- Shortform:
- David, 1889, Aust. Mus. Mem. 2(6): 127–132
- Author(s):
- David, T. W. Edgeworth
- Year published:
- 1889
- Title:
- Notes on a collection of igneous rocks from Lord Howe Island
- Serial title:
- Australian Museum Memoir
- Volume:
- 2
- Issue:
- 6
- Start page:
- 127
- End page:
- 132
- DOI:
- 10.3853/j.0067-1967.2.1889.484
- Language:
- English
- Date published:
- 31 December 1889
- Cover date:
- 31 December 1889
- ISSN:
- 0067-1967
- CODEN:
- AUNMA5
- Publisher:
- The Australian Museum
- Place published:
- Sydney, Australia
- Subjects:
- GEODIVERSITY; LORD HOWE ISLAND
- Digitized:
- 27 March 2009
- Available online:
- 16 July 2009
- Reference number:
- 484
- EndNote package:
- EndNote file
- Title page:
- Title page (140kb PDF)
- Complete work:
- Complete work (1064kb PDF)
Abstract
Introduction. The collection comprises about twenty specimens, collected by Mr. R. Etheridge, junr., and Mr. Alexander Morton.
Classification. Allthe hand specimens examined belong to the basalt group. They appear to belong to three leading types: 1. Basalt with olivine. Theseare chiefly dense dark greenish-gray rocks, for the most part little affected by decomposition, some of them probably being of comparatively recent origin.
2. Basalt without olivine, lateritic. Thisis a lateritic rock, of a dull brick-red colour, soft, earthy and amygdaloidal; passing in places into scoria. This lava may be partly submarine.
3. Basalt, diabasic. A hard dense pyritous rock of a greenish-gray colour and resembling an andesitic dolerite; it has undergone extensive alteration, and is probably of considerable geological antiquity.