Poor interney today, but better tonight. We are passing NE of Cuba now. Got done my California work and started in on Haiti. HW made a text file of a 100 m grid of multibeam bathymetry collected by the French about a week ago and generously made available. I imported that into the industry interpretation software and we would look at it and fly around it in 3D. I had already mapped a fault offshore north of the main fault a couple weeks ago, and this and other faults are seen on industry maps. The bathymetry in 3D shows the seafloor deformation of what looks like an active or at least not too ancient strike slip fault.

Our instruments include a multibeam bathymetry that is for use in shallow water: it does best in depth of about 250 m or less and the maximum depth where it can image well is about 400 m. Some of the faults are in water of over 1000 m.

The very hi resolution acoustic sub-bottom profiler can work in deep water but it will probably not image anything on evry steep slopes, and there are a lot of steep slopes.

I'm not in charge at all but we have notice on the industry seismic reflection profiles that there may be subsided terraces around the giant anticline offshore (and island) west of Port au Prince. These terraces would be formed during low stands of sea level during glacial times (20,000, 160,000, ~250,000, ~350,000, ~430,000, etc). If these are indeed ancient shorelines, they were once horizontal so they may be folded as well as subsided.

Better post before I lose connection.
Chris