Geology of the greenhorn mountains, northeastern oregon. Age and provenance of lower tertiary fluvial strata, elkhorn mountains, e. Field trip guide to the upper cretaceous hornbrook. Forests, grant county, oregon, about 30 mi northwest of baker, oregon. Geology of the blue mountains region of oregon, idaho, and washington. The range is surrounded by the cities of helena, montana city, townsend. Irwin openfile report 03306 supersedes openfile report 95558 2003 u. Hood, with a minimum elevation of 1295 m, maximum elevation of 3420 m, a mean of 2304 m, and a total area of 22. Riding injuries put unnecessary stress on medical systems that need all available resources to fight the virus, and group rides increase your chances of exposure. Elkhorn mountains is a mountain in oregon and has an elevation of 7425 feet.
Of these perennial snow and ice features, 12 are named glaciers all are labeled on the map on the right except coalman glacier, located in the crater at the summit usgs 1. This field trip examines the stratigraphy of the middle eocene wildcat mountain caldera exposed east of prineville, in the ochoco mountains of northcentral oregon. Our assignment of oneill and others 1996 newland formation. The bald mountain batholith in the elkhorn mountains of northeastern oregon has intrusive relations to a heterogeneous assortment of permian sediments and a triassic metagabbroserpentine sequence. Preliminary report on the geology and mineral deposits of the northern elkhorn mountains, jefferson and broadwater counties, montana one of 781 reports in the series. Geology of the eastern end of elkhorn ridge, baker county, oregon benson desonie, dana l. Dissertations and theses department of earth sciences. Elkhorn mountains, oregon we run two backpacking scrambles in the elkhorn mountains. Geology of the southern elkhorn mountains, jefferson and. A, relations between elkhorn mountains volcanics, cretaceous.
This is a view of the elkhorn mountains from baker city, oregon. Dixon and diane wolfgram support provided by the national cooperative geologic mapping program of the u. From prairie to alpine, mayflies to mountain goats, and scenic driving to tortuous climbing routes. All this sits within view of i84 near the baker city, and most folks just drive on by, missing some stunning scenery and an excellent chance at seeing wild goats. Projections of future low flows using the hydrologic simulations indicate small decreases in summer streamflow 30% streamflow decreases by 2080. File scanned at 300 ppi monochrome, 24bit color using capture perfect 3. The elkhorn mountains have got to be the most underrated chain in oregon, with awesome high lakes, gorgeous glaciercarved valleys, and mountain goats dotting the high alpine ridges. The granite watershed contains many abandoned mines. Geology and mineral deposits, east flank of the elkhorn. Trace elements investigations report available on this site.
Noah peters, 7, celebrates hiking to black lake in the elkhorn mountains of eastern oregon. Indicated and inferred marginal reserves, estimated at. Structural map of part of northeastern oregon, showing. Makes up entire elkhorn mountains volcanics in report area. The shadow appears to be a human face in late december and january on a clear day. If you know how they go please email me and i will post it on this page. Twin lakes and the elkhorn crest national scenic trail. Oregon department of fish and wildlife oregon department of fish and wildlife 61846 powder river lane north powder, or 97867 541 8982826 visitors guide located near the elkhorn range, elkhorn wildlife area is best known for the rocky mountain elk and mule deer herds that use it during the winter. Geology is an extremely visual subject, and in search of ancient oregon is a beautifully photographed, expertly written account of oregons fascinating geological story. Glacial geology of the elkhorn mountains, northeastern oregon glacial geology of the clarks fork lobe of the yellowstone ice sheet, absaroka and beartooth ranges, northwestern wyoming and adjacent montana. Geology of steamboat rock, grand coulee, washington glacial geology of the elkhorn mountains, northeastern oregon. Living up to its name how controversial hunting regulations restored big bulls to the elkhorn mountains.
Dogami geologic map series oregon department of geology. Oregon department of geology and mineral industries. Ore bin oregon geology magazine journal oregon department. The elkhorn mountains are partly within the wallowawhitman national forest and the north fork john day wilderness see also. Wild and scenic rivers, deep gorges and snowcapped mountains bring your hiking shoes, a bathing suit and your curiosity for this route. Largevolume pyroclastic d eposits along the eastern edge. Photos of the southern blue mountains this geology also led to the historical mining activity of the last 150 years. Click download or read online button to get a geologic history of brown mountain oregon book now. Written by a passionate and professional geologist who has spent countless hours in the field exploring and photographing the state, in search of ancient oregon is a book for all those interested in. Geologic map of the crescent mountain area, linn county, oregon, by gerald l. The north portion of the high elkhorn portion runs approximately from the junction of the union, granite and baker county lines southward along the baker. Weeks abstract the elkhorn mountains are an ovalshaped mountain mass in westcentral montana that is located between the city of helena and the valley of the jefferson river. Mountain biking irresponsibly during the covid19 pandemic puts you and others at risk. Free us topo map pdf order waterproof printed topo map.
These trips are sister scrambles, which means that they go opposite directions on the same route and swap car keys half way through. Glacial geology of the clarks fork lobe of the yellowstone ice sheet, absaroka and beartooth ranges, northwestern wyoming and. Packed into hells canyon scenic byways 218mile semicircle are the continents deepest river gorge, a mountain range of 9,000foot peaks and nine wild and scenic rivers. Elkhorn mountains is a mountain in montana and has an elevation of 4944 feet.
The highest peaks are the elkhorn mountains in oregon, which reach an elevation of 9,108 feet. Field trip guide to the middle eocene wildcat mountain. The nearest weather station for both precipitation and temperature measurements is helena ap which is approximately 9 miles away and has an elevation of 3,828 feet 1,110 feet lower than elkhorn mountains. Mountains are drained by thegrande ronde and imnaha rivers, both flowing in sharply cut canyons. Elkhorn mountains topo map in jefferson county, montana. As the byway climbs toward blue springs summit, youll get great views of the elkhorn mountains and their unusual layered geology. Farther to the northeast in the southern elkhorn mountains, the unconformity is within the ravalli group reynolds and brandt, 2006 at a level similar to our placement in the highland mountains. The highest point in the range is rock creek butte, which is 9,106 feet 2,776 m above sea level. Geology of the kharkhiraa mountains, mongolian altai. Geology of the blue mountains region of oregon, idaho, and. Glacial geology of the elkhorn mountains, northeastern oregon. Geology of the elkhorn mountains, northeastern oregon. The elkhorn mountains are a mountain range in southwestern montana, part of the rocky.
A geologic history of brown mountain oregon download. Geologic map and sections, southeast part of devils fence quadrangle, montana. Just a generation ago, a hunter would have been hardpressed to find a mature male elk in the elkhorn mountains. Vallier 1995 petrology of pretertiary igneous rocks in the blue mountains region of oregon, idaho, and washington. Preliminary report on the geology and mineral deposits of. We arrived saturday and hiked up to twin lakes from the trailhead at forest service road 030. Elkhorn wildlife management unit home us forest service. This weekend we took a long trip down to the elkhorn mountains for a two nighter. Master map file scanned at 600 dpi, 24bit color on a paradigm imagepro gxt 42 hd oem version of colortracsmartlf bx 42. Geology of the oregon part of the baker 1 degree by 2 degree.
Clarno formation at cougar rock in the elkhorn mountains of eastern oregon and a secondary pulse that occurred between 37. When the granitic magma cooled, various minerals formed along the contact zone with the older sedimentary rock and gold and silver collected in the granites quartz veins. These trips have the opportunity to summit elkhorn peak, and they will pass by several beautiful alpine lakes. Located between john day and the elkhorn mountains, the greenhorn mountains are a low uplift within the blue mountains.
Bedrock geology of the elkhorn mountains volcanics in the southern bull mountain area, jefferson county, montana by ron m. Geologic mapping in the klamath mountains is difficult due to. This story is featured in montana outdoors novemberdecember 2010 issue. Elkhorn mountains mountain biking trails trailforks. A bibliography of klamath mountains geology, california and oregon, listing authors from aalto to zucca for the years 1849 to mid2003 compiled by william p. Most of the blue mountains are underlain by the columbia river basalt group crb lava flows, primarily the grande ronde basalt, which erupted around 16. Below are weather averages from 1971 to 2000 according to data gathered from the nearest official weather station. Guide to hiking the elkhorn mountains statesman journal. Geology and petrology of isla san esteban, gulf of california, mexico mcbirney. Page 43 oregon pinot camp 2012 geology provides the landscape rock layers tilted sideways figures drawn from oregon geology parent of the soil, foundation for the wine presented by ray wells of the usgs at grape day 2006 in corvallis, oregon. A thick 4,000 to 6,000 ft sequence of andesitic lava, andesitic tuff, limestone and chertpebble conglomerate, sandstone, and siltstone previously thought to correlate with elkhorn mountains volcanics are named golden spike facies of elkhorn mountains. Their highest point is vinegar hill, at 8,300 feet. Oregon geology, volume 69, number 1, fall 2009 5 overview.
Explore a magnificent recreation and wildlife resource at the doorstep of helena, montanas capital city. The 5,864foot 1787meter summit is a popular snowmobile staging area in winter, offering access to more than 150 miles 241. This site is like a library, use search box in the widget to get ebook that you want. The former also cuts far back into the region of the northern elkhorn range and heads in the great granodiorite area north of cable cove, near sumpter. Usda forest service, r6nrecoltp0304 guide to the plants of the wallowa mountains of northeastern oregon, by georgia mason.
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