Hostname: page-component-848d4c4894-nmvwc Total loading time: 0 Render date: 2024-06-16T02:12:26.426Z Has data issue: false hasContentIssue false

Petrological Studies in the Harlech Grit Series of Merionethshire. II: The Petrography and Petrology of some of the Grits

Published online by Cambridge University Press:  01 May 2009

Austin William Woodland
Affiliation:
Department of Geology, Queen's University, Belfast.

Extract

The grits which occur intercalated among the Harlech Grit Series have very similar lithological characters throughout. In the field the individual grits are very persistent laterally and can be traced over large areas. During the course of work on the man-ganiferous members of this Series one such grit horizon, which has been termed the “Bluestone Grit”, and which occurs about 5–6 ft.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1938

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

VI. List of Works to Which Reference is Made

Boswell, P. G. H., 1930. “The Action of Colloids in Precipitating Finegrained Sediments,” Geol. Mag., LXVII, 371381.Google Scholar
Billinghurst, S. A., 1929. “Mineral Analyses of some Ordovician Rocks from Caernarvonshire,” Geol. Mag., LXVI, 289301.CrossRefGoogle Scholar
Fearnsides, W. G., 1910. Geology in the Field—Geology of North and Central Wales. London.Google Scholar
Fleet, W. F., 1925. “The Chief Heavy Detrital Minerals in the Rocks of the English Midlands,” Geol. Mag., LXII, 98128.CrossRefGoogle Scholar
Heard, A., and Davies, R., 1924. “The Old Red Sandstone of the Cardiff District,” Quart. Jour. Geol. Soc., lxxx, 489519.CrossRefGoogle Scholar
Mackie, W., 1923. “The Source of the Purple Zircons in the Sedimentary Rocks of Scotland,” Trans. Edin. Geol. Soc., xi, 200213.Google Scholar
Platt, J. I., and Davies, K. A., 1933. “The Conglomerates and Grits of the Bala and Valentian Rocks of the District between Rhayader (Radnorshire) and Llansawel (Carmarthenshire),” Quart. Jour. Geol. Soc., lxxxix, 202220.Google Scholar
Smithson, F., 1928. “Geological Studies in the Dublin District, I,” Geol. Mag., LXV, 1225.Google Scholar