Subduction

New crust is generated as plates pull away from each other and can either cause sea floor spreading or new land to be created. An example of a continental rift valley is the Eastern African Rift Valley which is being formed as the Eastern African plate is moving away from the main Africa plate in a north-easterly direction. Plates move apart due to convection currents in the lithosphere. As the crusts move away from each other the crust thins, tension in the lithosphere causes the plate to…

Consider the following questions on the carbon cycle: [2 pts] Assume that the atmospheric reservoir of CO2 contains 830 Gt of carbon, and the rate at which CO2 is removed from the atmosphere is 180 Gt of carbon per year. What is the residence time of CO2 in the atmosphere? (Give units) The residence time of CO2 in this atmospheric reservoir is 4.61 years. [6 pts] Using the concepts we’ve discussed in class, explain two temporal patterns that you observe in the figure below and the processes…

punctual and enormous. The San Andreas Fault almost had wiped out various counties, Los Angeles, San Fransico, San Diego and in the south up to Baja California, hitting as high a tremor as Mw 9.8 on the Moment Magnitude Scale. Then along the Cascadia Subduction Zone an earthquake of magnitude 7.8 occurred but the pressure built up under the sister faults, was partly released by the San Andreas major eruption. An aftershock has never been recorded to exceed a maximum magnitude of 1Mw less than…

Other languages spoken in India come from the Austro-Asiatic and Tibeto-Burman language families. India has no national language. Hindi, with the largest number of speakers, is the official language of the government. English is used extensively in business and administration and has the status of a "subsidiary official language"; it is important in education, especially as a medium of higher education. Each state and union territory has one or more official languages, and the constitution…