For the first time in several years, the El Niño-Southern
Oscillation did not dominate regional climate conditions
around the globe. A weak La Niña dissipated to ENSOneutral
conditions by spring, and while El Niño appeared
to be emerging during summer, this phase never fully
developed as sea surface temperatures in...
Salinity, temperature, oxygen, phosphate, and nitrate observations were taken by Oregon State University on 16 hydrographic cruises in the Northeastern Pacific Ocean during 1969. Alkalinity , pH and silicate were taken on special occasions. Nine cruises were taken along the Newport line. The rest were special cruises made off Depoe...
The Valley of Oaxaca, Mexico was home to one of the most intensively-studied archaic states in the New World. Centered at the hilltop city of Monte Albán, the Zapotec State first arose around 500 BC and eventually encompassed much of the present-day state of Oaxaca. But by the Late Classic...
The Yanacocha Mining District in northern Perú is considered the largest group of
high-sulfidation style epithermal gold deposits in the world. District-scale geologic mapping coupled with detailed 40Ar/39Ar geochronology, geochemistry and petrography establish the volcanic history of the area and analyze the temporal and spatial evolution of volcanism, hypogene advanced...
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John H. Dilles Anita L. Grunder
The Yanacocha Mining District in