In the absence of incontrovertible performance data in support of, or opposition to, school vouchers, court decisions on their legality become increasingly important. Analysis of legal challenges provides a rich opportunity for scholars and policymakers to follow arguments for or against their posit

Abstract The Wilson Creek field is situated in mountainous terrain of Rio Blanco County, Colo. It was discovered in early 1938 and produces from both the Morrison and Sundance sands of Jurassic age. The underlying Sundance reservoir is fully developed with 18 wells; no dry holes have been drilled. T

The effect of altitude on the distribution of insects has not been widely studied, and except for isolated observations, no work has been done on the vertical distribution of the ground beetles (Carabidae). It is the purpose of this thesis to show the distribution of the Carabidae throughout the alt

Violarite from the Copper King mine, Boulder County, Colo., occurs as a secondary mineral after pentlandite. It is associated with fresh pyrrhotite and with several altered forms of pyrrhotite including secondary pyrite after pyrrhotite. Hence violarite has a much broader stability range in the oxid

The skeletal remains of an adult male individual from the 5JF52 site was analyzed to the extent allowed by the condition of the bony skeleton. The analysis includes a description of the material, dentition, demographic information pertinent to age, sex, stature and race, and a complete analysis of m

Genetic variability at 27 loci was analyzed in four populations of pikas (Ochotona princeps) from Colorado. Estimates of mean heterozygosity [Formula: see text] ranged from 0.5 to 1.4%. These results are among the lowest estimates of [Formula: see text] reported for a mammal having a broad distribut

A recent article in American Antiquity entitled “Symposium on River Valley Archaeology” summarizes the present status of one of our most important and urgent problems in American archaeology today. Additional information concerning this subject, particularly with reference to the progress made in th

Workshops exploring environmental, social, and political scenarios to prepare for negotiating new Colorado River water management guidelines took on added realism when the COVID-19 pandemic started.

Social group structure often has consequences for individual fitness and ecological and evolutionary processes, but group structure is not fixed because of demographic processes: individuals die, disperse or are recruited into social groups. Thus, it is important to understand how demographic social

Abstract Ligusticum porteri (osha) is an important wild-harvested medicinal plant. Populations of this plant occur in meadows and forest understories in the subalpine and montane zones of the Rocky Mountains. We examined variation in the bioactive compounds of 44 methanolic extracts of L. porteri ro