hnalogo.jpg (103481 bytes)

 

Hugo Neighborhood Association & Historical Society

Home
Up
Geology
Soils
Water
Agricultural Lands
Forest Lands
Historical Context
Settlement Settings
Federal Land Transfers: 1850s-1930s
Railroad: 1883-2007
Emigrant PVC: 1880s-2007
Hugo Granite Tombstone Quarry Site: 1880s-1929
Highways: 1913 - 2007
Applegate Trail Integrity
Land Use
Research and Field Work

 

GEOLOGY

ASSESSMENT Of PROPOSED PIONEER MEADOWS SUBDIVISION
CONTAINING APPLEGATE TRAIL RESOURCES

IV.A. Geology

Geologically almost all of Section 14, and most of the Proposed Pioneer Meadows Subdivision, is identified as di = "Quartz diorite and related rock."1 Quartz diorite and related rock (di) includes hornblende diorite, granodiorite, and a few dacite and diabase dikes. Where decomposed is source of common fill (i.e., decomposed granite). Pegmatite veins contain high-purity quartz and feldspar. Minor gold, copper, and molybdenite mineralization occurs in "di" near contacts with older rocks.

Locally folks know about decomposed granite derived from the Grants Pass pluton’s granitic soils. Decomposed granite in Josephine County comes from a general soil map unit identified as Holland-Barron-Siskiyou.2 The soils in this general map unit are in areas dominated by moderately deep and deep, well drained and somewhat excessively drained soils on hillsides, toe slopes, and alluvial fans. When the soils in this group are disturbed, the hazard of erosion is high

A small part of the northwestern portion of the Proposed Pioneer Meadows Subdivision in Tax Lot 1900 is geologically quaternary sediment.1

1. Ramp, Len, compiled by. 1979. Geologic Map of Josephine County, Oregon. State of Oregon Department of Geology and Mineral Industries.

2. United States Department of Agriculture. Soil Conservation Service. December 1983. Soil Survey of Josephine County, Oregon. (0R033) (Now Natural Resources Conservation Service (NRCS).

Back to Top  

2012 Hugo Neighborhood Association & Historical Society