Lassen Volcanic National

In a climax to his sediment studies, Patterson reported tersely that we have found the composition of lead in snow to be very different from the composition of lead which has been deposited on the ocean floors during the past 100,000 years. The lead in Lassen Volcanic National Park had a signature mix of lead isotopes, a characteristic fingerprint identifying it as a... 

Mazor, E., Wasserburg, G. J. (1965) Helium, neon, argon, krypton and xenon in gas emanations from Yellowstone and Lassen volcanic National Parks. Geochim. Cosmochim. Acta, 29, 443-54. 

Chemistry of thermal and non-thermal springs in the vicinity of Lassen Volcanic National Park Journal of Volcanology and Geothermal Research, v. 25, p. 81-104. 

ML Sorey, EM Colvard, SE Ingebritsen. Measurements of Thermal-Water Discharge Outside Lassen Volcanic National Park, California, 1983-94. Water Resources Investigations Rep 94-4180-B. Denver, CO U.S. Geological Survey, 1994. 

---