Geology and geochemistry of early Proterozoic volcanic and subvolcanic rocks of the Pecos greenstone belt, Sangre de Cristo Mountains, New Mexico

1989 ◽  
pp. 119-146 ◽  
Author(s):  
James M. Robertson ◽  
Kent C. Condie
Keyword(s):  
New Mexico ◽  
Greenstone Belt ◽  
Early Proterozoic ◽  
Sangre De Cristo

Earthquake Hazard Estimation in Areas of Low Historical Seismicity: A Focus on the Northern Rio Grande Rift, Colorado and New Mexico

1990 ◽  
Vol 6 (4) ◽  
pp. 657-680 ◽  
Author(s):  
Charles E. Glass
Keyword(s):  
New Mexico ◽  
Gaussian Model ◽  
Rio Grande ◽  
Earthquake Hazard ◽  
Weibull Model ◽  
Historical Seismicity ◽  
Rio Grande Rift ◽  
Earthquake Activity ◽  
Sangre De Cristo ◽  
Northern Rio Grande

Estimates of the probability of future earthquake activity are difficult to make in areas where historical seismicity may be low or absent, but where young fault scarps attest to recent or ongoing tectonism. Three non-Poisson models, a Weibull model, a Gaussian model and a lognormal model, are used to estimate the earthquake hazard for one such area, the northern Rio Grande Rift. This portion of the Rio Grande Rift displays numerous Holocene faults attesting to ongoing tectonism, but displays essentially no historical seismicity. The earthquake hazard for the Sangre de Cristo fault zone from Taos, New Mexico to Salida, Colorado calculated using these models is remarkably consistent (probability of at least one Mo = 7 earthquake in the next 50 years ∼ 2.5 × 10−3), with increased hazard for the Sangre de Cristo fault in north San Luis Valley (∼5.0×10−3) and near Taos (∼1.0×10−2) due to the long holding times along these segments.

Sediments from pre-Cambrian rocks of southern Sangre de Cristo Mountains, New Mexico

1948 ◽  
Vol 18 (2) ◽  
pp. 74-78
Author(s):  
Raymond Sidwell ◽  
John Leo Haliburton
Keyword(s):  
Optical Properties ◽  
New Mexico ◽  
Mineral Content ◽  
Source Rocks ◽  
General Properties ◽  
Sangre De Cristo

Abstract Pre-Cambrian rocks in the southern Sangre de Cristo Mountains consist chiefly of granites, gneisses, and schists. Detritals released by weathering of these source rocks were studied for mineral content and general properties as sediments. Most of the minerals contain inclusions and have physical and optical properties that permit determination of source rocks.

Nitrogen Fixing Lichen Roles from Desert to Alpine in the Sangre de Cristo Mountains, New Mexico

1977 ◽  
Vol 80 (4) ◽  
pp. 561 ◽  
Author(s):  
Richard T. T. Forman ◽  
Deborah L. Dowden
Keyword(s):  
New Mexico ◽  
Nitrogen Fixing ◽  
Sangre De Cristo
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