Hostname: page-component-7bb8b95d7b-wpx69 Total loading time: 0 Render date: 2024-09-18T05:28:02.433Z Has data issue: false hasContentIssue false
  • English
  • Français

A Road Section near Guy's Hill, Jamaica

Published online by Cambridge University Press:  01 May 2009

C. A. Matley  and
Frank Raw
Get access Rights & Permissions [Opens in a new window]

Extract

The rocks exposed along the road between Linstead and Guy's Hill, Jamaica, were described by Dr. C. T. Trechmann in this magazine in 1936 (pp. 259–260). The chief object of his account was to prove that the igneous rocks there were intrusions later than the associated Cretaceous and Tertiary limestones, which, according to him, had been metamorphosed into hornfelses, some of which, he stated later (1937, p. 561), he knew to have an “igneous” appearance under the microscope, “which tends to support my contention that in Jamaica we have sedimentaries altered in situ into rocks that would ordinarily be classified as igneous.” Dissent from his descriptions and interpretations was expressed by C. A. M. (Matley, 1937, pp. 501–3), the criticisms being mainly based on an examination of Trechmann's own microscope slides by F. R. A visit to Jamaica by C. A. M. in 1939 allowed him to study this road and to collect a suite of rocks for petrological examination. The results show that Trechmann's interpretation cannot be sustained. There is no granodiorite or other plutonic rock present, no metamorphism hornfelsing the sedimentary rocks, and no igneous intrusions into the Tertiary limestones.

Type
Articles
Information
Geological Magazine , Volume 79 , Issue 4 , August 1942 , pp. 241 - 252
Copyright
Copyright © Cambridge University Press 1942

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

Literature Cited

Lane, A. C., 1903. Porphyritic Appearance of Rocks. Bull. Geol.Soc. America, xiv, 388.Google Scholar
Matley, C. A., 1937. The Age of the Jamaica Granodiorite and its Associated Rocks. Geol. Mag., lxxiv, 495–507.CrossRefGoogle Scholar
Raw, F., 1941. On a Remarkable Volcanic Tuff from near Kingston, Jamaica, and its bearing on the nature, origin, and destiny of Palagonite. Abs. Proc. Geol. Soc. of London, No. 1379, 14th 06, 1941, 64.Google Scholar
Sawkins, J. G., 1869. Reports on the Geology of Jamaica. Mem. Geol. Survey,Google Scholar
Trechmann, C. T., 1936. The Basal Complex Question in Jamaica. Geol. Mag., lxxiii, 251–267.CrossRefGoogle Scholar
Trechmann, C. T., 1937. The Supposed Basal Complex in Jamaica. Geol. Mag., lxxiv, 561–2.CrossRefGoogle Scholar