| Example photo of coastal bluffs where niche erosion/block collapse was the predominant mechanism (image courtesy of Ann Gibbs, U.S. Geological Survey).

| Example photo of coastal bluffs where niche erosion/block collapse was the predominant mechanism (image courtesy of Ann Gibbs, U.S. Geological Survey).

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Two prominent arctic coastal erosion mechanisms affect the coastal bluffs along the North Slope of Alaska. These include the niche erosion/block collapse mechanism and the bluff face thaw/slump mechanism. The niche erosion/block collapse erosion mechanism is dominant where there are few coarse sediments in the coastal bluffs, the elevation of the b...

Context in source publication

Context 1
... each photo, sand and gravel content data from one proximal core or bluff sample was used to determine the sediment areal density (Figure 7). Locations experiencing niche erosion/block collapse were readily determined based on the characteristic erosional blocks (Figure 8). Locations dominated by bluff face thaw/slump were evident based on the presence of a high elevation beach before the coastal bluff and the presence of material (e.g., vegetation) that was slumping on the bluff face ( Figure 9). ...