Ancon Hill Fm
Period:
Neogene
Age Interval:
Miocene - Woodring (1960)
Province:
Panama Canal basin
Type Locality and Naming
Named by Thompson, T. F. (1943). “Dense porphyritic much-jointed hard light-gray material. Pre-Pliocene.”
Forms rocks at Ancon Hill, located between towns of Panama and Balboarat (2014).
Forms rocks at Ancon Hill, located between towns of Panama and Balboarat (2014).
Synonym:
Lithology and Thickness
Rhyolite or dacite.
Thickness: N/A
Lithology Pattern:
Lava
Relationships and Distribution
Lower contact
N/A
Upper contact
N/A
Regional extent
Forms rocks at Ancon Hill, located between towns of Panama and Balboa
rat (2014).
GeoJSON
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Fossils
N/A
Age
Age Span:
Beginning stage:
Piacenzian
Fraction up in beginning stage:
0
Beginning date (Ma):
3.60
Ending stage:
Piacenzian
Fraction up in the ending stage:
1
Ending date (Ma):
2.58
Depositional setting
Depositional pattern:
Additional Information
References:
- Thompson, T. F. (1943).
- Woodring (1960). Though the rock forming the stock at Ancon Hill was described by Howe (1908) and MacDonald (1915) as a rhyolite, and was named by Thompson (1943) as a rhyolite, it is a dacite (Woodring, 1957). Miocene.
- Keroher et al. (1966)
Compiler:
Jacques LeBlanc (2021), Stratigraphic Lexicon: The Onshore Cenozoic Sedimentary Formations of The Republic of Panama. Biosis: Biological Systems, 2(1), 173 pp. https://doi.org/10.37819/biosis.002.01.0095 (or via https://sites.google.com/site/leblancjacques)