Gattarian Plutonites Gr
Period:
Ordovician
Age Interval:
Tremadocian - Hirnantian, Eg2
Province:
Egypt general
Lithology and Thickness
Granitic. Gattarian Plutonites and Later Dikes = Emplaced newer granites followed by a period of volcanicity. Acidic, intermediate, and basic dikes.
Lithology Pattern:
Granitic
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Hammamat Gr
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Um Bogma Fm (Lower Clastic Division Gr)
Regional extent
GeoJSON
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Fossils
Age
Tremadocian – Hirnantian
Age Span:
Beginning stage:
Tremadocian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
486.85
Ending stage:
Hirnantian
Fraction up in the ending stage:
1.0
Ending date (Ma):
443.07
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Said, R. The Geology of Egypt, 1962 pg. 19-20, 138.