PeleLaQuartzite Fm
Period:
Ordovician
Age Interval:
late Ordovician?
Province:
Bhutan
Type Locality and Naming
Tethyan Himalaya
Synonym: Called merely the "Quartzite Fm", but to avoid ambiguity with other Quartzite formations, called PeleLaQuartzite Fm here.
Lithology and Thickness
In Dang Chu klippe: gray, fine-grained sandstone of Quartzite Formation (?Late Cambrian) [But schematic regional stratigraphic columns of Martin, 2017, would imply late Ordovician; plus suggests conglomerate layers are within it]
Lithology Pattern:
Fine-grained sandstone
Relationships and Distribution
Lower contact
Schematic diagram of Martin (2017) suggests possible disconformable contact (spanning Middle Ordovician?) to the overlying Quartzite of uppermost Pele La Gr (called PeleLaQuartzite Fm here)
Upper contact
Discontinuity to Tang Chu Gr (Wachi La Fm).
Regional extent
GeoJSON
null
Fossils
Age
Schematic regional stratigraphic columns of Martin, 2017, would imply late Ordovician
Age Span:
Beginning stage:
Sandbian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
458.18
Ending stage:
Sandbian
Fraction up in the ending stage:
1.0
Ending date (Ma):
452.75
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extract from Legend to "Geologic Map of Bhutan" (Long, S., McQuarrie, N., et al., 2011, Journal of Maps). Age spans estimated from correlation diagrams in Martin, A.J. (2017, "A review of Himalayan stratigraphy, magmatism, and structure", Gondwana Research, 49: 42-80; http://dx.doi.org/10.1016/j.gr.2017.04.031), but these are often controversial.