Oxroad Bay Exposure D, Horizon 2: Tournaisian, United Kingdom

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Tantallosperma setigera seed/fruit Barnard and Long 1973
Ginkgoopsida - Calamopityales - Calamopityaceae
Deltasperma fouldenense seed/fruit Long 1961
Cordaitales
Amyelon spp. root Williamson 1874
unclassified
Oxroadia gracilis axis, megaspore Alvin 1965
see common names

Geography
Country:United Kingdom State/province:Scotland County:East Lothian
Coordinates: 56.0° North, 3.0° West (view map)
Paleocoordinates:10.3° South, 1.7° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period: Carboniferous Epoch: Mississippian
Stage: Tournaisian 10 m.y. bin: Carboniferous 1
Key time interval: Tournaisian
Age range of interval: 358.9 - 346.7 m.y. ago
Stratigraphy
Geological group:Lower Lothian Calciferous Sandstone Measures (Series) Formation:Garlton Hills Volcanics Member:Sunnyside/Rhodes Limestone
Local section:Oxroad Bay Exposure D Local bed:2
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: 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
Lithology and environment
Primary lithology:deformed bedding,grading,bioturbation,pyritic,gray siltstone
Secondary lithology:grading sandstone
Includes fossils?Y
Includes fossils?Y
Lithology description: 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...
Environment:lacustrine - large Tectonic setting:back-arc basin
Geology comments: 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)
Taphonomy
Modes of preservation:adpression,permineralized,charcoalification
Size of fossils:macrofossils,mesofossils,microfossils
Spatial resolution:allochthonous
Collection methods and comments
Collection methods:selective quarrying,surface (in situ),mechanical,peel or thin section,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: 4 blocks collected from section 3.8
Metadata
Database number:36227
Authorizer:H. Sims Enterer:J. Cassara
Modifier:M. Uhen Research group:paleobotany
Subset of collection #:10674
Created:2004-01-19 14:33:05 Last modified:2018-11-20 09:59:08
Access level:the public Released:2004-01-19 14:33:05
Creative Commons license:CC BY
Reference information

Primary reference:
3954.ETE 234R. 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]