Project Sulky. Geologic and Engineering Properties Investigation.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Pagination or Media Count:
The Sulky event was a nuclear cratering experiment in which a device yielding 85 plus or minus 15 tons was detonated at a depth of 90 feet in jointed basalt. The explosion produced a rubble-covered mound roughly circular in plan and extending approximately 24 feet above the original ground surface. Prior to the event the Sulky site was explored by means of six core borings and the emplacement calyx hole. Geophysical logging was conducted and laboratory tests were performed on representative samples. The rock consists of vesicular basalt over dense basalt and each type is structurally modified by layering of vesicles resulting from viscous flow of the lava. The gross subsurface effect of the blast was development of a camouflet about 60 feet in diameter surrounded by a ruptured and dilated zone averaging about 200 feet in diameter. The limit of the dilated zone flares near the surface and in the center a chimney of the expanded media is inferred to have subsided and partially filled the camouflet. Author
- Physical and Dynamic Oceanography