User:Thyermj/sandbox
Copy/Paste of Idaho Batholith
The Idaho Batholith is a granitic and granodioritic batholith of Cretaceous-Paleogene age that covers approximately 25,000 square kilometres (9,700 sq mi) of central Idaho and adjacent Montana. The batholith has two lobes that are separated from each other geographically and geologically. The smaller Bitterroot lobe in the north is separated from the larger Atlanta lobe in the south by the Belt Supergroup metamorphic rocks that compose the Salmon River Arch. The Bitterroot lobe is 75 to 53 million years old, and the Atlanta lobe is 98 to 68 million years old.[1][2] Much of the Atlanta and Bitterroot lobes are in the Idaho Batholith ecoregion.[3] The Bitterroot lobe shows regional strain with foliation that strikes to the northwest and dips to the northeast which is parallel with other natural features in the area such as the Louis and Clark line.[4][5] The Louis and Clark line is a area of weekend crust where major faulting has occurred with steep or vertical dipping and striking to the northwest.[6] The Atlanta lobe lacks uniform deformation and foliation across the lobe but contains small areas of localized deformation.[4]
Atlanta Lobe
Mineralogy and Petrology
Age
Bitterroot Lobe
Mineralogy and Petrology
Age
 | This is a user sandbox of Thyermj. You can use it for testing or practicing edits. This is not the sandbox where you should draft your assigned article for a dashboard.wikiedu.org course. To find the right sandbox for your assignment, visit your Dashboard course page and follow the Sandbox Draft link for your assigned article in the My Articles section. |
References
- ^ Foster, D.A.; Fanning, C.M. (1997). "Geochronology of the northern Idaho Batholith and the Bitterroot metamorphic core complex: magmatism preceding and contemporaneous with extension". Geological Society of America Bulletin. 109: 379–394. doi:10.1130/0016-7606(1997)109<0379:GOTNIB>2.3.CO;2.
- ^ Gaschnig, R.M.; Vervoort, J.D.; Lewis, R.S.; McClelland, W.C. (2010). "Migrating magmatism in the northern US Cordillera: in situ U–Pb geochronology of the Idaho batholith". Contributions to Mineralogy and Petrology. 159: 863–883. doi:10.1007/s00410-009-0459-5.
- ^ "Ecoregions of Idaho" (PDF). U.S. Environmental Protection Agency. Retrieved December 22, 2014.[permanent dead link]
- ^ a b Kahn, Maureen; Fayon, Annia K.; Tikoff, Basil (2020-07-01). "Constraints on the post-orogenic tectonic history along the Salmon River suture zone from low-temperature thermochronology, western Idaho and eastern Oregon". Rocky Mountain Geology. 55 (1): 27–54. doi:10.24872/rmgjournal.55.1.27. ISSN 1555-7340.
- ^ Byerly, A.; Tikoff, B.; Kahn, M.; Jicha, B.; Gaschnig, R.; Fayon, A.K. (2017-04). "Internal fabrics of the Idaho batholith, USA". Lithosphere. 9 (2): 283–298. doi:10.1130/L551.1. ISSN 1941-8264.
{{cite journal}}: Check date values in:|date=(help) - ^ Harrison, J.E.; Griggs A.B.; Wells J.D. (1986). "Geologic and Structure Maps of the Wallace 1(degree) x 2 (degree) Quadrangle, Montana and Idaho". U.S. Geological Survey. Map I-1509-A: sheet 2 of 2.