Testing crustal melting models for the origin of flood rhyolites: A Nd-Pb-Sr isotopic study of the Tertiary Davis Mountains volcanic field, west Texas

1996 ◽  
Vol 101 (B9) ◽  
pp. 20407-20422 ◽  
Author(s):  
K. L. Cameron ◽  
D. F. Parker ◽  
D. E. Sampson
Keyword(s):  
Volcanic Field ◽  
Crustal Melting ◽  
Isotopic Study ◽  
West Texas ◽  
Davis Mountains

Basement control of alkalic flood rhyolite magmatism of the Davis Mountains volcanic field, Trans-Pecos Texas, U.S.A.

Lithos ◽  
2017 ◽  
Vol 292-293 ◽  
pp. 234-249 ◽  
Author(s):  
Don F. Parker ◽  
John C. White ◽  
Minghua Ren ◽  
Melanie Barnes
Keyword(s):  
Volcanic Field ◽  
Davis Mountains

Fire regimes of the piñon–juniper woodlands of Big Bend National Park and the Davis Mountains, west Texas, USA

2009 ◽  
Vol 39 (6) ◽  
pp. 1236-1246 ◽  
Author(s):  
H.M. Poulos ◽  
R.G. Gatewood ◽  
A.E. Camp
Keyword(s):  
National Park ◽  
Fire Regime ◽  
Fire Regimes ◽  
Climatic Conditions ◽  
Tree Regeneration ◽  
Big Bend National Park ◽  
Fire Scar ◽  
West Texas ◽  
Big Bend ◽  
Davis Mountains

While piñon woodlands cover much of arid North America, surprisingly little is known about the role of fire in maintaining piñon forest structure and species composition. The lack of region-specific fire regime data for piñon–juniper woodlands presents a roadblock to managers striving to implement process-based management. This study characterized piñon–juniper fire regimes and forest stand dynamics in Big Bend National Park (BIBE) and the Davis Mountains Preserve of the Nature Conservancy (DMTNC) in west Texas. Mean fire return intervals were 36.5 and 11.2 years for BIBE and DMTNC, respectively. Point fire return intervals were 150 years at BIBE and 75 years at DMTNC. Tree regeneration in west Texas piñon–juniper woodlands occurred historically during favorable climatic conditions following fire years. The presence of multiple fire scars on our fire-scar samples and the multicohort stands of piñon suggested that low intensity fires were common. This study represents one of the few fire-scar-based fire regime studies for piñon–juniper woodlands. Our results differ from other studies in less topographically dissected landscapes that have identified stand-replacing fire as the dominant fire regime for piñon–juniper woodlands. This suggests that mixed-severity fire regimes are typical across southwestern piñon forests, and that topography is an important influence on fire frequency and intensity.

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