Transactions of the Royal Society of Edinburgh: Earth Sciences

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Transactions of the Royal Society of Edinburgh: Earth Sciences (2003), 94:325-339 Royal Society of Edinburgh Scotland Foundation
Copyright © Royal Society of Edinburgh 2003
doi:10.1017/S0263593300000729

Research Article

A review of the palaeoenvironments and biota of the Windyfield chert


Stephen R. Fayersa1 and Nigel H. Trewina1

a1 Department of Geology and Petroleum Geology, Meston Building, King's College, University of Aberdeen, Aberdeen AB24 3UE, UK.
Article author query
fayers sr [Google Scholar]
trewin nh [Google Scholar]

ABSTRACT

The Windyfield chert site is located 700 m NE of the original Rhynie chert locality at Rhynie, Aberdeenshire, Scotland. Originally identified by concentrations of surface float material, a drilling and trenching programme of the area in 1997 revealed a chert ‘pod’ in situ interbedded with fluvial/lacustrine sandstones and hydrothermally altered shales. Chert morphologies identified from float blocks and trench material range from tabular beds to lenticular pods displaying massive, nodular, laminated and brecciated fabrics, and geyserite splash textures. A suite of floral and faunal associations, when combined with distinctive macro- and microscopic chert textures, has been used to interpret depositional conditions. Palaeoenvironments ranged from terrestrial laminated, brecciated and vegetated sinter sheets to low-temperature pools and marginal aquatic settings. The flora comprises six higher land plant species, nematophytes, charophytes, various fungi and probable cyanobacteria. Arthropods include branchiopod crustaceans, a euthycarcinoid, trigonotarbid arachnids, centipedes, eoarthropleurids and a possible hexapod. The biota of the Windyfield chert is closely comparable to that found in the Rhynie chert. Together, the Windyfield and Rhynie cherts contain the most diverse associated fossil arthropod fauna of terrestrial and freshwater origin from rocks of comparable age anywhere in the world.

(Received September 17 2003)

(Accepted June 10 2004)

Key Words: Arthropods; epithermal; freshwater; Lower Devonian; plants; Rhynie; Scotland; sinter; terrestrial