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Geotechnical aspects of fine-grained mass flow deposits: California Continental Borderland

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Abstract

Seismic reflection profiling demonstrates the importance of mass movement in the north-central California Borderland. Bulk properties of surficial hemipelagic sediments in the Santa Barbara, Santa Cruz, and San Nicolas basins show that different types of mass-transported sediments have different properties, although their general sedimentologic characteristics are very similar. Slump deposits have moderate water contents (48% wet weight basis), high plasticity indices (46%), and moderate activities (1.6). For debris flows these values are low: 28%, 5%, and 0.3, respectively, and for other types (liquefied flow, mudflows, and turbidities) the values are high: 54 to 63%, 49 to 58%, and 1.2 to 1.5, respectively.

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Hein, F.J., Gorsline, D.S. Geotechnical aspects of fine-grained mass flow deposits: California Continental Borderland. Geo-Marine Letters 1, 1–5 (1981). https://doi.org/10.1007/BF02463293

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  • DOI: https://doi.org/10.1007/BF02463293

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