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Melez Chograne Fezzan Basin Formation
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Melez Chograne Fezzan Basin Fm base reconstruction

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: