posted on Oct, 7 2009 @ 03:09 PM
reply to post by Riaan
Feedback received from one of the forums I posted this article on was that the islands on the sub-merged plateaus in the Caribbean may simply have
been warnings to sailors of shallow waters in those areas. This sent me back to the drawing board (actually, my map books and the Internet in search
of topographical information about the ‘shallow water’ areas of the Caribbean). I soon discovered the 1625 map of the Caribbean by Henry Briggs
(below, centre), which clearly differentiates between shallow waters (dashed lines) and islets within these regions. What happened to these
I contacted several leading authorities on oceanography in search of high resolution bathymetry maps, who were quick to point out that many of these
islands (typically sand banks one or two meters above sea level) had been washed away by hurricanes. A good example of this is in fact the Dry
(E on my figures), of which some islands have disappeared as late as 1875.
Based on this evidence I have to conclude that the mapping of the Caribbean most likely had very little to do with maps dating from thousands of
years before and that the information must indeed have been obtained by the early Portuguese and Spanish explorers.
The same cannot necessarily be said of the Brazilian islands (Fig. 1.62a on my website), though, unless the disappearance of islands B to D and
the second island of group E (Fig 1.62a on website) can be attributed to some (other) kind of natural phenomenon active over the past 500 years (any
. The island group E is visible from the sky (NASA shallow topography map below), but the others are definitely deeper below sea level.
The Encarta Interactive World Atlas ocean floor topography seems to be in error (see Fig. 1.62a) as it suggests that these ‘islands’ are more than
90m below sea level, which does not appear to be the case judging from the NASA images.
Hires images of these figures can be downloaded here www.riaanbooysen.com...