Evaporites in the Middle Devonian of the Orcadian Basin near Berriedale, Caithness

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doi: 10.1144/sjg29010045
Authors:Donovan, R. N.
Author Affiliations:Primary:
Texas Christian University, Department of Geology, Fort Worth, TX, United States
Volume Title:Scottish Journal of Geology
Source:Scottish Journal of Geology, Vol.29(Part 1), p.45-54. Publisher: Scottish Academic Press, Edinburgh, United Kingdom. ISSN: 0036-9276
Publication Date:1993
Note:In English. 34 refs.; illus. incl. strat. col., sect., geol. sketch map
Summary:Synopsis A Middle Devonian Old Red Sandstone outlier at Berriedale, Caithness, is interpreted as a low energy, fluvio-lacustrine sequence which was deposited in an embayment on the southwestern margin of the Orcadian basin. The lacustrin e facies contains rare pseudomorphs and crystal casts, probably after gypsum. Replacement minerals are mostly ferroan and non-ferroan calcite but also include chert varieties, pyrite, haematite, siderite, and barite. It is suggested that drusy carbonate pseudomorphous textures are crystal-cast-filling cements, whereas anhedral sparite mosaics record pseudomorph replacement. The complexity of the salt diagenesis is a reflection of an interplay between lake, surface, and ground waters.
Subjects:Carbonate rocks; Chemically precipitated rocks; Depositional environment; Devonian; Diagenesis; Evaporites; Middle Devonian; Old Red Sandstone; Paleocurrents; Paleogeography; Paleozoic; Pseudomorphism; Sedimentary rocks; Atlantic Ocean; Caithness Scotland; Europe; Great Britain; Highland region Scotland; North Atlantic; North Sea; Orcadian Basin; Scotland; United Kingdom; Western Europe; European Atlantic
Coordinates:N581000 N584000 W0030000 W0035000
Abstract Numbers:94M/2485
Record ID:1993024709
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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