Hawaz Fm
Period:
Ordovician
Age Interval:
Floian – Dapingian, Lb2
Province:
Libya
Lithology and Thickness
USGS Chart places this formation at the base of Arenigian stage, lower middle Ordovician. Alternating siltstones and sandstones. Cross-bedding is common.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hasawnah Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Melaz Shuqran Fm
Regional extent
GeoJSON
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Fossils
No diagnostic fossils.
Age
Floian - Dapingian
Age Span:
Beginning stage:
Floian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
477.08
Ending stage:
Dapingian
Fraction up in the ending stage:
1.0
Ending date (Ma):
469.42
Depositional setting
Deposited as offshore tidal sands and deltaic high stand deposits represented by a coarsening-upward of sandstones.
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.