- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Australasia
-
New Zealand (1)
-
-
North America
-
Rocky Mountains
-
U. S. Rocky Mountains
-
Wind River Range (1)
-
-
-
-
Ruby Mountains (1)
-
Sierra Nevada (2)
-
South Island (1)
-
Southern Alps (1)
-
United States
-
California (4)
-
Idaho (1)
-
Nevada (2)
-
Texas (1)
-
Trans-Pecos (1)
-
Truckee River (2)
-
U. S. Rocky Mountains
-
Wind River Range (1)
-
-
Western U.S. (1)
-
Wyoming
-
Wind River Range (1)
-
-
-
-
geochronology methods
-
lichenometry (1)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene (1)
-
-
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Maestrichtian (1)
-
Senonian (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
volcanic rocks (1)
-
-
-
minerals
-
minerals (1)
-
silicates
-
sheet silicates
-
clay minerals (1)
-
-
-
-
Primary terms
-
Australasia
-
New Zealand (1)
-
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene (1)
-
-
-
clay mineralogy (1)
-
diagenesis (1)
-
geochronology (2)
-
geomorphology (3)
-
glacial geology (2)
-
igneous rocks
-
volcanic rocks (1)
-
-
maps (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous
-
Maestrichtian (1)
-
Senonian (1)
-
-
-
-
minerals (1)
-
North America
-
Rocky Mountains
-
U. S. Rocky Mountains
-
Wind River Range (1)
-
-
-
-
sedimentary petrology (2)
-
sedimentary rocks (1)
-
sedimentation (1)
-
sediments
-
clastic sediments
-
boulders (1)
-
gravel (1)
-
sand (1)
-
-
-
soils (2)
-
stratigraphy (2)
-
structural geology (1)
-
United States
-
California (4)
-
Idaho (1)
-
Nevada (2)
-
Texas (1)
-
Trans-Pecos (1)
-
Truckee River (2)
-
U. S. Rocky Mountains
-
Wind River Range (1)
-
-
Western U.S. (1)
-
Wyoming
-
Wind River Range (1)
-
-
-
weathering (1)
-
-
sedimentary rocks
-
sedimentary rocks (1)
-
-
sediments
-
sediments
-
clastic sediments
-
boulders (1)
-
gravel (1)
-
sand (1)
-
-
-
-
soils
-
paleosols (1)
-
soils (2)
-
Abstract During the Quaternary, large deep-seated landslides were initiated along the eastern flank of the Colorado Front Range, and rivers cut and deposited large strath terraces along the western High Plains. These are the most extensive and prominent geomorphic features in the landscape. On this field trip, we will explore the Quaternary evolution of these Front Range features, in addition to viewing the smaller erosion scars and deposits associated with a 1000-yr precipitation event in 2013. We begin the trip near Golden, Colorado, where we will view the most extensive Quaternary strath terrace (Rocky Flats) preserved in the Denver Basin. We then head to Boulder, Colorado, to view the contrast between recent debris flows and deep-seated Quaternary landslides. Near Lefthand Creek, north of Boulder, we will view a suite of strath terraces and discuss the cosmogenic radionuclide dates that indicate both rapid incision and a new version of the terraces ages. Throughout the day, we will focus on the geomorphic work done by rare events, as well as discuss numeric and relative dating of Quaternary terraces and landslides.
Abstract The Boulder Creek Watershed, like many western watersheds, is composed of a high-gradient upper reach mostly fed by snowmelt, a substantial change in gradient at the range front, and an urban corridor within the lower section. Water from Boulder Creek provides many services, including drinking water, crop irrigation, power plant cooling, wastewater disposal, recreation, and aquatic life habitat. A multi-use path follows Boulder Creek through the city of Boulder, serving as a link to parks, schools, a hospital, a library, public transportation, and businesses, and provides the opportunity to observe many of the important uses and features of the Boulder Creek corridor. This 16-mile field trip will follow this path, using rented bicycles, to explore the hydrology and geochemistry of Boulder and South Boulder Creeks. Topics will include flood frequency and hazards, aqueous geochemistry of the watershed, and potential impacts of invasive species, nonpoint source pollution, and emerging contaminants on stream ecology. This field trip follows the GSA guide published from the 2007 GSA Annual Meeting in Denver (available at http://fieldguides.gsapubs.org/ ): Verplanck, P.L., Murphy, S.F., Birkeland, P.W., Pitlick, J., Barber, L.B., and Schmidt T.S., 2008, Boulder Creek: A stream ecosystem in an urban landscape, in Raynolds, R.G., ed., Roaming the Rocky Mountains and Environs: Geological Field Trips: Geological Society of America Field Guide 10, p. 217–233, doi: 10.1130/2008.fld010(10).
Abstract The Boulder Creek Watershed, within the Front Range region of Colorado, istypical of many western watersheds because it is composed of a high-gradient upperreach mostly fed by snowmelt, a substantial change in gradient at the range front, andan urban corridor within the lower gradient section. A stream ecosystem within anurban landscape not only can provide water for municipal, industrial, and agriculturalneeds, but also can be utilized for recreation, esthetic enjoyment, and wastewaterdisposal. The purpose of this 26 km bicycle field trip is to explore the hydrology andgeochemistry of Boulder and South Boulder Creeks and to discuss topics includingflood frequency and hazards, aqueous geochemistry of the watershed, and potentialimpacts of invasive species and emerging contaminants on stream ecology. Keywords: Colorado Front Range, flood hazard, water quality, invasive species