Report on 1964 Chatham Mud Island, Erin Bay, Trinidad, West Indies

摘要: In August, 1964, a new mud island appeared above the sea about 1½ miles offshore from Chatham on south coast of Trinidad. It rose to maximum height approximately 25 feet mean sea-level and had an original area 10½ acres at low tide. lay close axis Southern anticline, tectonic feature that shows well-marked mud-volcano activity adjacent land. The mass was composed silty clay containing numerous boulders ranged few inches 2½ in diameter. components age Late Cretaceous Miocene but it is considered probable all those older than were derived rubble beds associated with Range anticline. Extrusion soft took place during first 2 days, apparently beginning east extending along line trending NNW.-SSE. Growth ceased days compaction erosion followed until disappeared below 8 months later. main force causing extrusion formation could have been tectonic, result gas pressure, or combination both. Although given off quantity, lack evidence for high pressures necessary extrude estimated 9 million cubic material leads writers believe movement principal reason phenomenon.