• Source: Mint Canyon Formation

The Mint Canyon Formation (Tm) is a Miocene geologic formation in the Sierra Pelona Mountains of Los Angeles County, southern California. The formation preserves fossils dating back to the Middle to Late Miocene (Barstovian and Clarendonian in NALMA classification).




Geology


Mint Canyon is a fluvial landform in the Sierra Pelona range. It consists of terrestrial deposits from streams and lakes consisting mostly of sandstone and conglomerate with some claystone.
The formation correlates with the Caliente Formation in the Plush Ranch Basin to the northwest and the lower Punchbowl Formation in the Punchbowl Block to the southeast. The Mint Canyon Formation consists primarily of fluvial, alluvial, and lacustrine conglomerates, sandstones, and mudstones. The Mint Canyon Formation is overlain by the dominantly marine Castaic Formation, which consists of shale, sandstone, and minor conglomerate. In the Texas Canyon sub-basin, the formation is overlain by the Saugus Formation. The contact between the Mint Canyon and Castaic Formations is an angular unconformity in some places, and it is apparently conformable and gradational in others.




Fossil content


The formation preserves vertebrate fossils dating back to the Middle Miocene subperiod of the Neogene period:




= Mammals

=



Artiodactyls




Perissodactyls




Rodents

Pronotolagus apachensis



Proboscideans

Gomphotherium sp.



Carnivora

Canidae indet.




See also






References






= Bibliography

=
Coffey, Kevin T.; Ingersoll, Raymond V.; Schmitt, Axel K. (2019), "Stratigraphy, provenance, and tectonic significance of the Punchbowl block, San Gabriel Mountains, California, USA", Geosphere, 15 (2): 479–501, Bibcode:2019Geosp..15..479C, doi:10.1130/GES02025.1
Alroy, J (2002), Synonymies and reidentifications of North American fossil mammals
Stirton, R.A (1933), "Critical review of the Mint Canyon mammalian fauna and its correlative significance", American Journal of Science, 226 (156): 569–576, Bibcode:1933AmJS...26..569S, doi:10.2475/ajs.s5-26.156.569
Maxson, J. H (1930), "A Tertiary mammalian fauna from the Mint Canyon Formation of Southern California", Carnegie Institution of Washington Publication, 404: 77–112




Further reading


Geology of the Mint Canyon Area by William T. Holser, 1946




External links


Field Notes regarding Mint Canyon taken by Hildegarde Howard on California Revealed

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