Where: Scotland, United Kingdom (56.0° N, 3.0° W: paleocoordinates 10.3° S, 1.7° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Sunnyside/Rhodes Limestone Member (Garlton Hills Volcanics Formation), Tournaisian (358.9 - 346.7 Ma)
• Occurs at the center of the most disrupted strata. Occupies a mini-graben bounded by two parallel SW-NE oriented faults. Sediments produce a pseudochannel. Grading is common.
•Scottish Midland Valley
• bed-level stratigraphic resolution
Environment/lithology: lacustrine - large; graded, bioturbated, pyritic, gray siltstone and graded sandstone
• A valuable analogue for these deposits is provided by the thicker, more extensive, and better-know Burdiehouse Limestone Fm...which were deposited in an extensive but shallow meromictic lake (Lake Cadell)...(Loftus 1985; Loftus & Greensmith 1988)
• Horizons vary greatly in degree of texture (siltstones to coarse lapilli tuffs) and degree of induration. In general the coarser and/or more calcareous horizons are more strongly indurated. Grading is common in coarser sections.Grading is common and most evident in the coarser horizons. Upward-fining horizons outnumber upward coarsening horizons, and flame structures occur at the top the coarse lapilli tuff of horizon 2.25. Two horizons near the base of the sequence (1.5 and 1.9) contain abundant in situ pteridosperm roots and can therefore be confidently described as paleosols. Two thick siltstone horizions...contain nodular calcareous concretions. The lower siltstone is a slightly darker grey and richer in pyrite than the upper...
Size classes: macrofossils, mesofossils, microfossils
Preservation: adpression, permineralized, charcoalification
Collection methods: quarrying, surface (in situ), mechanical, peel or thin section,
• 28 blocks collected from section 2.30, 3 blocks collected from section 1.29.
Primary reference: R. M. Bateman and G. W. Rothwell. 1990. A reappraisal of the Dinantian floras at Oxroad Bay, East Lothian, Scotland. 1. Floristics and the development of whole-plant concepts. Transactions of the Royal Society of Edinburgh 81:127-159 [H. Sims/J. Allen/H. Sims]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 36278: authorized by Hallie Sims, entered by Jason Cassara on 24.01.2004
Creative Commons license: CC BY (attribution)
• Specimens collected from two sections within horizon (see comments field).
Show authors, comments, and common names
, Stauropteris cf. berwickensis
, Amyelon spp.
, cf. Oxroadopteris parvus
, Lyginorachis waltonii
, Lyginorachis sp.
, Tantallosperma setigera
, cf. Sphaerostoma sp.
, Stamnostoma sp.
, cf. Telangium sp.
, cf. Melissiotheca sp.
section 2.30: axes, leaves, strobili, megaspores; section 1.29: axes, leaves, megaspores
| Pseudosporochnales -
| Calamopityales - Calamopityaceae