St Helens 1980
Stato: Mali Anno: 1999 Notizie: Mount St. Helens is located in Washington state in the northwestern United States. Mount St. Helens erupted volently in 1980. The sudden removal of the volcano's northern flank by an avalanche released pent-up pressure in the interior of the volcano. The volcano erupted laterally to the north and devastated an area of almost 400 square kilometers. Mount St. Helens is paired with the Allende meteorite. A shower of stony meteorites fell on February 8, 1969 in the state of Chihuahua in northern Mexico. The meteorite fragments covered a large area of over 300 square kilometers. Allende is classified as a CV3 carbonaceous chondrite. Specimens of Allende preserve evidence of the earliest processes in the formation of the solar nebula from which the Earth and other planets were born. The calcium-aluminum inclusions found in Allende suggest an origin in pre-existing interstellar grains which mixed with the forming solar nebula. Hence these inclusions are older than the Earth itself. Allende also contains a new form of carbon called fullerene, a soccer-ball shaped molecule of sixty or more carbon atoms. Some scientists claim Allende contains fossilized microorganisms of possible extraterrestrial origin. |
|---|