1-20 OF 49 RESULTS FOR

colluvium

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(04)
EISBN: 9780813756202
... or marginally stable rock and soil masses (colluvium, i.e., old landslide debris) on many of the hillsides of the region. Abstract The Pittsburgh region has long been recognized as one of major landslide activity. This results from the geology and geomorphic processes shaping the region. The underlying...
FIGURES | View All (23)
Series: GSA Field Guide
Published: 01 January 2011
DOI: 10.1130/2011.0020(04)
EISBN: 9780813756202
... over colluvium. Stop 3—Interstate Route 79 ~2.5 mi north of Ohio River. Exposures of common local stratigraphy (includinginfamous Pittsburgh red beds) often involved in landslides, small masses of slumped bedrock, and a valleystress relief bedding plane shear zone. Typical colluvial...
FIGURES | View All (23)
Series: GSA Field Guide
Published: 01 January 2009
DOI: 10.1130/2009.fld015(23)
EISBN: 9780813756158
... landslide. The road cut exposes colluvium that buries an eroded paleo-scarp. Wood collected from a clay lens buried by the colluvium was radiocarbon tested at >40,000 yr B.P. The drainage divide is also the site of a previously unmapped, northwest-southeast-trending, high-angle fault that forms...
Series: GSA Reviews in Engineering Geology
Published: 01 January 2008
DOI: 10.1130/2008.4020(07)
EISBN: 9780813758206
... of rainfall intensities and durations observed in Seattle. Figure 4. Particle-size distributions of hillside colluvium and outwash sand (Qva) collected in the Seattle, Washington, area. Distributions of colluvium are labeled by the underlying geologic unit. Qvt—Vashon subglacial fill; Qob—Olympia...
FIGURES | View All (12)
Series: GSA Field Guide
Published: 01 January 2005
DOI: 10.1130/2005.fld006(20)
EISBN: 9780813756066
... convexity at the southern end near Twin Butte. Quaternary and Tertiary basalts, stream deposits, and colluvium cover much of the landscape along the fault. The basalts overlie the slightly tilted Paleozoic rocks forming an angular unconformity; and the basalts are faulted, though not as much...
FIGURES | View All (17)
Journal Article
Published: 01 February 2002
Quarterly Journal of Engineering Geology and Hydrogeology (2002) 35 (1): 51-60.
...C.R.I. Clayton; U. Fiumani; M.C. Matthews Abstract The paper describes a slope failure in granular colluvium, together with its geomorphological, seismic and geotechnical setting. The predictions from conventional geotechnical slope stability analyses, taking into account topography, pore pressure...
FIGURES | View All (9)
Journal Article
Journal: GSA Bulletin
Published: 01 March 2001
GSA Bulletin (2001) 113 (3): 305-319.
... records of this study provide a crucial physical link between hillslope sediment sources and depositional basins, and between geomorphology and sedimentology. We compare rare Neogene colluvium and buried hillslopes preserved in superproximal basin-fill exposures to their Quaternary and modern equivalents...
FIGURES | View All (12)
Journal Article
Journal: Geology
Published: 01 November 2000
Geology (2000) 28 (11): 995-998.
... is not in steady state, but is currently evacuating sediment accumulated during periods of more rapid sediment generation and lower sediment yield. Nuclide data indicate that (1) sediment leaving the basin is derived primarily from hillslope colluvium, (2) bedrock weathers more rapidly beneath a cover of colluvium...
FIGURES | View All (4)
Journal Article
Published: 11 September 2000
Canadian Journal of Earth Sciences (2000) 37 (10): 1321-1334.
... Creek confluence. Within a few days of the formation of the landslide dam, a spillway notch had been cut through the deposit, thereby preventing the occurrence of a catastrophic dam break. The landslide, which triggered the debris flow, originated in deep volcanic colluvium having a previous history...
FIGURES | View All (9)
Journal Article
Published: 01 July 2000
Bulletin de la Société Géologique de France (2000) 171 (4): 397-405.
Journal Article
Journal: Geology
Published: 01 July 2000
Geology (2000) 28 (7): 639-642.
... of volcanic ash and lapilli have accumulated during the past 18 k.y. ( Andronico et al., 1996 ) (Fig. 1) . Several meters of pyroclastic-fall deposits, interbedded with paleosols, characterize the areas of low slope, whereas several tens of centimeters of colluvium and pyroclastic material characterize...
FIGURES | View All (6)
Journal Article
Journal: Geology
Published: 01 January 2000
Geology (2000) 28 (1): 27-30.
...Joel Pederson; Frank Pazzaglia; Gary Smith Abstract Rare outcrops of Miocene-Pliocene buried hillslopes and colluvium present in proximal basin-fill exposures in the arid southwestern United States, in settings free of tectonic influences, reveal hillslope-sediment production and delivery...
FIGURES | View All (4)
Journal Article
Published: 01 October 1999
Bulletin of the Seismological Society of America (1999) 89 (5): 1250-1263.
Journal Article
Journal: Geology
Published: 01 March 1997
Geology (1997) 25 (3): 267-270.
...Joseph A. Mason; James C. Knox Abstract Colluvium on foot slopes in parts of North America and Europe has been attributed to a major mass-wasting episode during the last glacial period. Stratigraphic evidence and 14 C ages support this hypothesis for the northern part of the Upper Mississippi...
Journal Article
Published: 01 January 1997
Environmental and Engineering Geoscience (1997) III (3): 329-348.
Journal Article
Journal: Geology
Published: 01 December 1996
Geology (1996) 24 (12): 1127-1130.
... Pampeanas in Argentina reveal extensive Quaternary reverse faulting. 14 C dates of 1080 ± 70 and 1310 ± 40 yr B.P. have been determined on organic material from colluvium on the footwall of the east-dipping Los Molinos branch of the Comechingones fault. They indicate at least 2.1 m of slip, probably...
Journal Article
Published: 01 June 1996
Canadian Journal of Earth Sciences (1996) 33 (6): 875-895.
..., and Inlin Brook) expose bedrock and Tertiary gravel overlain by colluvium and a multiple till sequence of montane origin, separated by paleosols and capped by a till of Laurentide origin. The sections are correlated on the basis of lithology, paleosol development, paleomagnetism, and chlorine dating...
Journal Article
Published: 01 June 1996
Canadian Journal of Earth Sciences (1996) 33 (6): 896-903.
... a normally magnetized colluvium at its base, which is overlain by two reversed tills, succeeded by three normal tills. We interpret the top two tills to be of Brunhes age (< 780 ka) but argue that the lowermost normal till is of probable Olduvai age (ca. 1.8 Ma). The two underlying tills are of Matuyama...
Journal Article
Journal: Geology
Published: 01 June 1996
Geology (1996) 24 (6): 539-542.
Journal Article
Published: 01 January 1996
Environmental and Engineering Geoscience (1996) II (3): 393-405.