Diagram showing patterns of erosion and deposition that produce seafloor pockmarks
![Diagram showing patterns of erosion and deposition that produce seafloor pockmarks](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/Diagram%20showing%20patterns%20of%20erosion%20and%20deposition%20that%20produce%20seafloor%20pockmarks.jpg?itok=Ad72yMZ3)
Detailed Description
A diagram illustrating how the patterns of erosion and deposition associated with three sediment gravity flows could produce the stacked pockmarks and lateral migration observed in AUV-collected Chirp profiles. Long, uneventful episodes of hemipelagic drape (a, d, g, j) are intermittently interrupted by sediment gravity flows that either: 1b. Erode through the accumulated hemipelagic drape, deepening and potentially shifting the pockmark centers before 1c. Leaving a regional turbidite with thicker deposits in pockmark centers. 2e. Pass by without noticeable erosion, and 2f. Deposit a regional turbidite with thicker deposits in pockmark centers or 3h. Cause significant erosion in pockmark centers, eroding through hemipelagic drape as well as buried turbidites, and 3i. Leave a regional turbidite with a thick flat-top sandy deposit in pockmark centers. Note, that while this diagram illustrates the pockmarks migrating downflow, no consistent migration direction is seen in the Chirp data.
Sources/Usage
Public Domain.