Melez Chograne Fezzan Basin Fm
Period:
Ordovician
Age Interval:
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Lithology and Thickness
Melez Chograne Fm LITHOLOGY= Melaz Shuqran (Melez Chograne) Fm- USGS Chart places this formation at the base of Llandeilian stage, in the upper middle Ordovician. Variegated siltstones and claystones, thin-bedded. Represents a major flooding event, and cobbles and boulders with striations suggest periglacial conditions and iceberg rafting. Some regions contain boulders and pebbles in a silty matrix, suggesting a proglacial delta. Regional outcrops contain units of non-glacial facies, which represent distal shelves and ice margin deposits. CALIBRATION = Base of Darriwilian. REFERENCE = Chart derived from: USGS Correlation Chart and Columnar Section for Rocks in Libya, 1963. Descriptions from: Hallet, Don: Petroleum Geology of Libya, 2002.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Upper contact
Regional extent
GeoJSON
{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[15,29],[14,28],[15,27],[16,28],[15,29]]]]}}
Fossils
Age
Age Span:
Beginning stage:
Darriwilian
Fraction up in beginning stage:
0
Beginning date (Ma):
469.42
Ending stage:
Katian
Fraction up in the ending stage:
0
Ending date (Ma):
452.75
Depositional setting
Depositional pattern:
Additional Information
long: 15 lat: 28
Compiler: