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Title: Slides for MURI review.


Abstract not provided.

Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the MURI program review.
Country of Publication:
United States

Citation Formats

Shaner, Eric A., and Michael Weimer. Slides for MURI review.. United States: N. p., 2016. Web.
Shaner, Eric A., & Michael Weimer. Slides for MURI review.. United States.
Shaner, Eric A., and Michael Weimer. Mon . "Slides for MURI review.". United States. doi:.
title = {Slides for MURI review.},
author = {Shaner, Eric A. and Michael Weimer},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Aug 01 00:00:00 EDT 2016},
month = {Mon Aug 01 00:00:00 EDT 2016}

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  • Abstract not provided.
  • The 1,400 km long Beringian margin is characterized by several very large submarine canyons and by a large oceanic plateau at the southern end. GLORIA sidescan-sonar imagery provides a perspective of this margin that is unattainable with conventional acoustic profiles. The broad coverage of GLORIA images emphasizes that, of all the sedimentary processes affecting this vast margin, mass movement is clearly the dominant shaping process. Styles of failure include mud and debris flows, slumps, and massive block slides, some covering areas greater than 1,500 km{sup 2}. GLORIA imagery and seismic-reflection profiles show evidence for a wide variety of slides andmore » slumps in the canyons of the northern margin, Navarin and Pervenets. The 100 km long shelf edge between these two canyons is characterized by a series of scalloped slide scars and incipient scars associated with blocks of sedimentary material, 1 to 2 km across. One of the largest single slide masses is a huge block tens of kilometers wide that occurs on the rise in the central part of the margin beyond the mouth of Zhemchug Canyon. Sliding of this block may have initiated the incision of the world's largest submarine canyon. The removal of this block accelerated headward erosion by retrograde failure until Zhemchug Canyon was cut back to a fault parallel to the shelf edge. Mass movement along the southern margin is widespread at the edges of Umnak Plateau. One mass failure, well-defined by GLORIA, is about 30 km wide and 55 km long. This and other slides along the plateau are associated with diapiric-like structures, suggesting relatively recent tectonism.« less
  • Numerous rock slope failures have occurred in major road cuts in Southwestern Pennsylvania over the past several years. Most of these cuts have existed for 25 to 30 years. The obvious hazard to motorists, pedestrians, and the roadway itself has prompted the Pennsylvania Department of Transportation to undertake a comprehensive study of several major cut slopes to determine their stability, both present and long term, and to formulate plans for remedial work where it is considered necessary. A detailed study was completed recently of five large cuts along a two mile stretch of US Route 51 next to the Ohiomore » River in Beaver County, Pennsylvania. The study combined structural geology data and computer models of existing and proposed cut slope configurations. Results of the investigation indicate that the slope will not undergo major failures involving large quantities of rock. Rather, failures will be localized and will involve several cubic yards to several hundred cubic yards of rock. Types of rock failures that occur on this series of road cuts are dominantly plane failures along joint surfaces, with rock falls and joint controlled wedge failures being minor in abundance. Plane failures occur in sandy shale and sandstone beds on joints that are parallel to the Ohio River. The road cuts were made along these joints rather than by well planned rock slope engineering methods. The strike of the joints is parallel to the strike of local fold axes suggesting structural control of the formation of joints. Measures recommended to reduce the potential of rock slides include flattering the slopes, rock bolts, anchored wire mesh, shotcrete, buttresses, and drainage systems.« less
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