. The Earth beneath the sea : History . 80° 70° 60° 50° 40° 30° 20° 10° 0' 90° 100° 110° 120° Fig. 2. Seamounts, atolls, volcanoes and related features in the world exclusive of the Pacific. Uncertainty of reported occurrences indicated by query. in sufficient detail to establish the shape, and bedrock has been dredged from about 50. It seems clear that almost all, if not all, seamounts are submarine volcanoes because the bedrock is always basalt, and the shapes and slopes are characteristic of no other land-form. The only volcanic feature lacking in early surveys of seamounts was a crater at
. The Earth beneath the sea : History . 80° 70° 60° 50° 40° 30° 20° 10° 0' 90° 100° 110° 120° Fig. 2. Seamounts, atolls, volcanoes and related features in the world exclusive of the Pacific. Uncertainty of reported occurrences indicated by query. in sufficient detail to establish the shape, and bedrock has been dredged from about 50. It seems clear that almost all, if not all, seamounts are submarine volcanoes because the bedrock is always basalt, and the shapes and slopes are characteristic of no other land-form. The only volcanic feature lacking in early surveys of seamounts was a crater at the top. This occasioned much speculation. However, the Precision Depth Recorder shows craters on many seamounts and it is highly probable that the earlier types of sounders simply concealed the crater in confused side echoes. The total number of seamounts (including guyots) shown on the distribution charts is probably only a small fraction of the number that exists. The charts
Size: 2758px × 1812px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
