Hawaz Fezzan Basin Fm
Period:
Ordovician
Age Interval:
Province:
Libya
Type Locality and Naming
Column: Fezzan Basin
Lithology and Thickness
Hawaz Fm LITHOLOGY= USGS Chart places this formation at the base of Arenigian stage, lower middle Ordovician. Alternating siltstones and sandstones. Cross-bedding is common. Deposited as offshore tidal sands and deltaic highstand deposits represented by a coarsening-upward of sandstones. No diagnostic fossils. CALIBRATION = Base of Floian. 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:
Sandy claystone
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:
Tremadocian
Fraction up in beginning stage:
1
Beginning date (Ma):
477.08
Ending stage:
Darriwilian
Fraction up in the ending stage:
0
Ending date (Ma):
469.42
Depositional setting
Depositional pattern:
Additional Information
long: 15 lat: 28
Compiler: