. The Earth beneath the sea : History . Fig. 32. Earthquake epicenters in the North Atlantic and the mid-oceanic rift. (After Elmendorf and Heezen, 1957.) a. Crest provinces The rift mountains and high fractured plateau, which constitute this category, form a strip 50-200 miles wide. In some places, particularly the Xorth Atlantic, the rift valley is bounded by the iuAvard-facing scarps of the rift mountains. The floor of the rift valley lies 500-1500 fm below the adjacent peaks of the rift mountains. The rift mountains drop abruptly to the high fractured plateau, which lies in depths of 1600-

---

. The Earth beneath the sea : History . Fig. 32. Earthquake epicenters in the North Atlantic and the mid-oceanic rift. (After Elmendorf and Heezen, 1957.) a. Crest provinces The rift mountains and high fractured plateau, which constitute this category, form a strip 50-200 miles wide. In some places, particularly the Xorth Atlantic, the rift valley is bounded by the iuAvard-facing scarps of the rift mountains. The floor of the rift valley lies 500-1500 fm below the adjacent peaks of the rift mountains. The rift mountains drop abruptly to the high fractured plateau, which lies in depths of 1600-1800 fm on either side of the rift mountains. An earthquake belt follows the rift valley (Figs. 32 and 33). Heat-flow measurements

---

Size: 1981px × 2524px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom