Week 2.5: Seafloor Features
|Erin Hunter in the Okeanos Explorer control room.|
|Images that have been mapped on the NOAA Okeanos Explorer.|
Two more features that intrigued me are a very long and winding sediment driven channel formation and two unusual semicircle formations on the West Florida Escarpment. The sediment river, or subterranean channel, originates around the Mississipi Delta southwest of Desoto Canyon and runs southeast for 164 km (or more-entire are not mapped yet). In the lower southern region, approximately 20m high ridge walls span 300m to over 700m across the channel. This entire snakelike formation lies at a seafloor depth of 2,954m. This is deep! The Northwest Florida Escarpment, situated directly to the northeast of the subterranean channel, rises 1,885m above the seafloor and presents a scene of an alien landscape.
|The Northwest Florida Escarpment, situated directly to the northeast of the subterranean channel, rises 1,885m above the seafloor and presents a scene of an alien landscape.|
Another more mysterious formation was read on the multibeam in the lower region of the escarpment west of the Florida Everglades. For now, since we only have half the picture, it looks like two large semicircles They are large in diameter with the southern formation stretching 8,247m but shallow in height with ridges of about 35m or less. We will have to wait for the next Gulf of Mexico cruise to fill in the blanks on these features.
Well if you are following along, I hope you are enjoying riding along the mapping adventures of the Okeanos Explorer. I will send another entry before we wrap things up in Norfolk next week. Cheers, Erin