The mapping has also revealed submarine channels several kilometers wide and "slumped blocks of sediment, meters in diameter and probably several million years old, that slipped down into the channels," says Julian Dowdeswell, director of Cambridge University's Scott Polar Research Institute.
... separates the slump block from unslumped material of the same character.
The 3D rupture surface of the slump block was input into Dan3D-Flex, and a frictional rheology was used to simulate initial rotational failure.
Moreover, as retention slump-block deposits (inferior filter beds) usually occur at the bottom of the channel, the vertical heterogeneity of such compound sand bodies is relatively strong.
The second phase of the failure consisted of rapid evacuation of a rock avalanche from the toe of the displaced slump block (Coe et al. 2016).
The first stage included reactivation of an ancient slump block in a unit consisting of shales and marlstones, with an estimated total volume of rock displaced by the slump of 54 Mm3 (White et al. 2015; Coe et al. 2016).
Immediately down slope of the slump block there is little change in the topography, indicating that either there was no deposition in this zone, or there was erosion of path materials that were later replaced by deposition of rock avalanche debris.
The southeastern margin of the basin is mostly eroded but may have trended N50°E as indicated by the distribution of slumped reef blocks.
The finding may be particularly useful in identifying and characterizing landslides that occur in steep, remote areas where few people live not because of their immediate effects, but because such slumps can block rivers and impound lakes that could later breach the natural dams and threaten populated areas downstream.
We'd been to the market, where guys nodded off on butcher's blocks slumped next to animal carcasses, and carried on over a crossroads, out of the tourist zone, down a street lined with shopfronts selling trainers and shirts and plastic kitchen things—normal stuff that normal people buy, nothing for tourists like us.
