![]() |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
Latah CountyThe rolling Palouse of western Latah County is underlain by loess hills deposited above Miocene Columbia River basalt that flowed eastward from vents in Washington. Miocene and younger sediments were deposited upstream of the ends of these basalt flows and underlie much of the farming country between Moscow and Bovill. The unique Oligocene Potlach volcanics are found in the northwestern part of the quadrangle. The Potato Hill volcanics are found west of Bovill. The eastern part of the county is underlain by Mesoproterozoic Belt Supergroup, with the metamorphosed garnet-bearing Wallace Formation exposed in the northeastern part of the county, south of Fernwood and the Emerald Creek garnet district. The central part of the county is underlain by Cretaceous granodiorite, one of the northern parts of the Idaho batholith, that extends westward into eastern Washington. Written by P.K. Link, 9/02 Additional ReadingRocks Rails and Trails: page References on Idaho Geology |
||||||||||||||||||||||||||||||||||||||||||||||||||||
Click here to see a correlation of geologic units, and the associated time scale. Click here for a printable version of this map.
|