Lori Sandstone Fm
Period:
Devonian, Silurian, Ordovician
Age Interval:
Dapingian – Emsian, Lb3
Province:
Libya
Type Locality and Naming
Column: Cyrenaica Basin
Synonym:
Lithology and Thickness
Thick sequence of sandstones at the base, overlain by clayey sandstone units.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Eghei Sandstone Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Continental Post-Tassilian Gr
Regional extent
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[16.77,28.92],[17.75,23.9],[18.77,23.18],[19.83,23.81],[20.54,23.72],[21.92,24.26],[23.03,26.98],[23.27,30.13],[21.58,30.61],[20.73,31.1],[20.43,32.4],[20.36,33.26],[19.37,33.11],[18.07,33.46],[18.09,34.15],[17.64,35.35],[16.6,34.88],[14.9,33.89],[13.92,32.67],[15.59,31.26],[15,30.64],[16.77,28.92]]]]}}
Fossils
Age
USGS Chart places this unit at the base of the Llandeilian stage, middle Ordovician. (Dapingian – Emsian)
Age Span:
Beginning stage:
Dapingian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
471.26
Ending stage:
Emsian
Fraction up in the ending stage:
1.0
Ending date (Ma):
394.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Chart derived from: USGS Correlation Chart and Columnar Section for Rocks in Libya, 1963. Descriptions from: Hallet, Don: Petroleum Geology of Libya, 2002.