The Mint Canyon Formation (Tm) is a Miocene geologic formation in the Sierra Pelona Mountains of Los Angeles County, southern California.[1] The formation preserves fossils dating back to the Middle to Late Miocene (Barstovian and Clarendonian in NALMA classification).[2]
| Mint Canyon Formation | |
|---|---|
| Stratigraphic range: Mid-Late Miocene (Barstovian-Clarendonian) ~ | |
 Sedimentary outcroppings in the Canyon Country borough of Santa Clarita | |
| Type | Geologic formation |
| Underlies | Castaic & Saugus Formations |
| Overlies | Tick Canyon Formation |
| Lithology | |
| Primary | Conglomerate & sandstone |
| Other | Mudstone |
| Location | |
| Coordinates | 34°30′N 118°30′W / 34.5°N 118.5°W |
| Approximate paleocoordinates | 33°54′N 115°00′W / 33.9°N 115.0°W |
| Region | Los Angeles County, California |
| Country |  United States |
| Extent | Sierra Pelona Ridge, San Gabriel Mountains |
| Type section | |
| Named for | Mint Canyon |
| Named by | Kew |
| Year defined | 1923 |
  Mint Canyon Formation (the United States)  Mint Canyon Formation (California) | |
Geology
editMint 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.[1][3]
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.[4] 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.[5] In the Texas Canyon sub-basin, the formation is overlain by the Saugus Formation.[6] 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.[5]
Fossil content
editThe formation preserves vertebrate fossils dating back to the Middle Miocene subperiod of the Neogene period:[2]
Mammals
editArtiodactyls
editPerissodactyls
editRodents
editProboscideans
editCarnivora
editSee also
editReferences
edit- ^ a b Elsmerecanyon.com: "Tick Canyon Geology"
- ^ a b Mint Canyon Formation at Fossilworks.org
- ^ "Geologic Map of the Mint Canyon Quadrangle" (DF-57) by Thomas W. Dibblee, Jr., 1996.
- ^ Coffey et al., 2019, p.480
- ^ a b Coffey et al., 2019, p.481
- ^ Coffey et al., 2019, p.492
- ^ a b c Stirton, 1933
- ^ a b c d e f g Maxson, 1930
- ^ a b c Alroy, 2002
Bibliography
edit- 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
edit- Geology of the Mint Canyon Area by William T. Holser, 1946