Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-24T17:10:14.784Z Has data issue: false hasContentIssue false
  • English
  • Français

Basalt Textures from the Southeastern Lower Galilee, Israel

Published online by Cambridge University Press:  01 May 2009

M. J. Oppenhein
M. J. Oppenhein
Affiliation:
Dept. of Geology, Hebrew University, Jerusalem.
Get access Rights & Permissions [Opens in a new window]

Abstract

Basalt groundmass textural nomenclature is reviewed and revised. The intergranular and ophitic extures are seen as end members of a series with steadily increasing grain-size, the international representative of which is here termed the “isogranular” texture. Undere intrusive conditions the series may be extended to include the poikilitic texture. Ophitic texture is regarded as an intergrowth;the term “sub-ophitic”s not suitable for basalts but may be retained for texturally isotropic rocks. When basalts cool hurriedly they will tend to develop an intergranular texture whereas extension of the crystallization period permits the formation of an ophitic texture. Cooling conditions will be determined by a combination of the effects of the volatile concentration and the flow characteristics, the latter partly depending on topography.

Type
Articles
Information
Geological Magazine , Volume 101 , Issue 6 , 30 December 1964 , pp. 548 - 557
Copyright
Copyright © Cambridge University Press 1964

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Clark, R. H., 1952. The siginificance of flow structure in the micro-porphyritic ophitic basalts of Arthur's Seat. Trans. geol. Soc. Edinburgh, 15, 69–83.Google Scholar
Elliott, R. B., 1952. Trachy-ophitic texture is Carboniferous basalts. Miner. Mag., 29, 925–928.Google Scholar
Holmes, A., 1918. The basaltic rocks of the Arctic region. Miner. Mag., 18, 80–223.Google Scholar
Johannsen, A., 1939. A descriptive petrography of the igneous rocks. Vol. I, 2nd. ed., Chicago.Google Scholar
Kemp, J. F., 1900. A handbook of rocks for use without the microscope. 2nd. ed., New York.Google Scholar
Krokström, T., 1932. On the ophitic texture and the order of crystallisation in basaltic magmas. Bull. geol. Inst. Upsala, 24, 197–216.Google Scholar
Oppenheim, M. J., 1962. The geology of the South-eastern Galilee lava fields. Bull. Res. Council of Israel, II-G, 56–84.Google Scholar
Rosenbusch, H., 1887. Mikroskopische Physiographic, 2nd. ed.Google Scholar
Tomkeieff, S. I., 1945. Petrology of the Carboniferous igneous rocks of the Tweed Basin. Trans. geol. Soc. Edinburgh, 14, 53–75.CrossRefGoogle Scholar
Tyrrell, G. W., 1926. The principles of petrology. London.Google Scholar
Wager, L. R., 1961. A note on the origin of ophitic texture in the chilled olivine gabbro of the Skaergaard intrusion. Geol. Mag., 98, 353–366.CrossRefGoogle Scholar
Walker, F., 1957. Ophitic texture and basalt crystallisation. J. Geol., 65, 1–14.Google Scholar