Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-26T10:19:06.249Z Has data issue: false hasContentIssue false
  • English
  • Français

The Stratigraphy and Structure of the Arenaceous Formation of the Main Range Foothills, F.M.S

Published online by Cambridge University Press:  01 May 2009

J. A. Richardson
J. A. Richardson
Affiliation:
(Published by permission of the Director, Geological Survey, Federated Malay States.)
Get access Rights & Permissions [Opens in a new window]

Extract

The evidence relating to the problems raised by the Arenaceous Formation of the Main Range Foothills may be summarized thus:—

(i) The Foothills are built as a rule of predominantly arenaceous sediments; belts of quartzite-conglomerate occur and argillaceous types generally are interspersed with the coarser grained rocks.

(ii) Lithological variations northwards and southwards along the strike of the Formation, and eastwards and westwards through its strati-graphical succession are very great.

(iii) No fossils have been found anywhere in these rocks and their age is consequently not definitely known.

(iv) The Foothills have obviously been the site of orogenic pressures and metamorphism, and they appear to have formed a buttress against which the Permocarboniferous rocks have been moulded by forces from east-south-east or east.

(v) There is a persistent difference of 10° to 20° between the general strike of the Foothills Formation and that of the Permocarboniferous Formation along the eastern margin of the Foothills in the 35-mile tract examined by the writer. This fact cannot be accepted as proof that an angular unconformity exists because structural complexities dependent upon (iv) above can also afford a satisfactory explanation of this divergence of strike.

(vi) Scrivenor has mapped the Foothills Formation as Triassic, so that its easterly dip below the Permocarboniferous must, on this hypothesis, be due to overfolding.

(vii) Between the western margin of the Foothills and the Main Range granite, occur rocks, many of them strongly metamorphosed, which may originally have been calcareous shales, pyroclasts, and impure limestones, presumed, on lithological grounds, to be of Permocarboniferous age. Their alteration has been so profound that no transitional types have been discovered between thorough-going amphibole- and epidote-schists and the presumed parental calcareous sediments. Metamorphosed argillaceous and arenaceous rocks accompany them.

Type
Articles
Information
Geological Magazine , Volume 83 , Issue 5 , October 1946 , pp. 217 - 229
Copyright
Copyright © Cambridge University Press 1946

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

List of References

Annual Reports of the F.M.S. Geological Survey Department. 1933, paras. 18–53.Google Scholar
Annual Reports of the F.M.S. Geological Survey Department. 1934, paras. 22–37.Google Scholar
Annual Reports of the F.M.S. Geological Survey Department. 1937, paras. 96–162.Google Scholar
Annual Reports of the F.M.S. Geological Survey Department. 1938, paras. 51–109.Google Scholar
Annual Reports of the F.M.S. Geological Survey Department. 1939, paras. 44–51.Google Scholar
Annual Reports of the F.M.S. Geological Survey Department. 1940, para. 39.Google Scholar
Cox, L. R., 1936. On a Fossiliferous Upper Triassic Shale from Pahang, Federated Malay States. Ann. and Mag. Nat. Hist., Ser. 10, vol. xvii, pp. 213–221, 02, 1936.CrossRefGoogle Scholar
Richardson, J. A., 1939. The Geology and Mineral Resources of the Neighbourhood of Raub, Pahang, F.M.S., with an account of the Raub Australian Gold Mine. F.M.S. G.S.D. Publication.Google Scholar
Savage, H. E. F., 1925. A Preliminary Account of the Geology of Kelantan. Journ. Mai. Branch, Roy. As. Soc., vol. iii, pt. i, 1925.Google Scholar
Savage, H. E. F., 1937. The Geology of the Neighbourhood of Sungei Siput, Perak, F.M.S., with an Account of the Mineral Deposits. F.M.S. G.S.D. Publication.Google Scholar
Scrivenor, J. B., 1907. The Geology of Gunong Tahan. F.M.S. Govt. Gazette, 1907.Google Scholar
Scrivenor, J. B., 1908. The Sedimentary Rocks of Singapore. Geol. Mag., vol. v, 1908.Google Scholar
Scrivenor, J. B., 1911. The Geology and Mining Industries of Ulu Pahang, with a Geological Sketch-map. Kuala Lumpur, 1911.Google Scholar
Scrivenor, J. B., 1907 and Jones, W. R., 1919. The Geology of South Perak, North Selangor, and the Dindings. Kuala Lumpur, 1919.Google Scholar
Scrivenor, J. B., and Willbourn, E. S., 1923. The Geology of the Langkawi Islands, with a Geological Sketch-map. Journ. Mai. Branch, Roy. As. Soc., vol. i, No. 88, pt. 2, 1923.Google Scholar
Scrivenor, J. B., and Willbourn, E. S., 1923. The Structural Geology of British Malaya. Journ. Geol., vol. xxxi, No. 7, 1923.Google Scholar
Scrivenor, J. B., and Willbourn, E. S., 1924. The Geology of Singapore Island with a Geological Sketch-map. Journ. Mai. Branch, Roy. As. Soc., vol. ii, pt. i, 1924.Google Scholar
Scrivenor, J. B., and Willbourn, E. S., 1931. The Geology of Malaya. Macmillan and Co., Ltd., London.Google Scholar
Umbgrove, J. H. F., 1938. Geological History of the East Indies. Bull. Am. Assoc. Pet. Geol., vol. 22, No. 1, 1938.Google Scholar
Willbourn, E. S., 1926. The Geology and Mining Industries of Kedah and Perlis. Journ. Mal. Branch, Roy. As. Soc., vol. iv, pt. iii 1926.Google Scholar