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Two new species of the rhynchonellid brachiopod Probolarina are described, Probolarina neoleonensis new species and Probolarina papalotensis new species. They were collected from a Paleocene limestone lens associated with a diapir in the La Popa basin, northeastern Mexico. Thousands of these brachiopods occur in this lens and constitute the first report of brachiopods for the Difunta Group, from which a diverse paleobiota has been previously reported. This occurrence represents the oldest record for the genus in the Western Hemisphere, as the only other Paleocene occurence of this genus was reported from New Zealand. Recent studies suggest that the carbonate lentil from which the brachiopods were collected were deposited in the shadow-effect area adjacent to the diapir, which affected the sediment influx into the basin.

Ejecta-bearing strata are present at the top of Cretaceous foreland-basin deposits throughout the La Popa basin in northeastern Mexico. In the southeast part of the basin, locally thick (as much as 4.6 m) ejecta-rich conglomeratic strata occupy valley-like features at a bathymetric break that separated Maastrichtian upper shoreface from lower shoreface and prodelta depositional settings. Clast-supported textures, normally graded planar conglomerate-sandstone couplets, upcurrent-dipping low-angle cross-laminae, sparse paleocurrent data, and transported fossils indicate deposition by south- to southeast-directed turbulent, supercritical flow. In the northwest part of the basin, ejecta grains are present but less common in correlative deposits. Sediment, ejecta, and organisms were eroded from shoreward environments and transported basinward by backflow of run-up surge(s) emplaced against the continent by one or several tsunami(s). High-discharge, supercritical offshore-directed flow provides a mechanism for transport of voluminous, ejecta-bearing sediment and late Maastrichtian marine organisms into deep-water Gulf of Mexico settings. Keywords: Chicxulub Crater, ejecta, tsunami, Cretaceous-Tertiary boundary, Mexico.

Purpose: We used measures created to assess the quality of life (QOL) of nursing home residents to distinguish among nursing facilities. Design and Methods: We statistically adjusted scores for 10 QOL domains derived from standardized interviews with nursing home residents for age, gender, activities of daily living functioning, cognitive functioning, and length of stay, and then we aggregated them to the facility level. We compared the patterns across a sample of 40 facilities. We correlated facility characteristics with QOL scores. Results: The pattern of QOL scores for each of the 10 domains was generally consistent within a given facility. Although resident characteristics played a major role in explaining variance, there were significant effects of facilities as well. Some modest relationships were found between facility characteristics such as ownership, percentage of private rooms, and rural-urban location and facility QOL scores. No effect of facility size was detected. Implications: This article shows that it is possible to differentiate among facilities on the basis of resident self-reported QOL. On the basis of our analysis, we find that a sample of 28 residents per facility is sufficient to generate a reliable QOL score for each of the domains studied.

Background. Quality of life (QOL) is a goal for nursing home residents, but measures are needed to tap this phenomenon. Methods. In-person QOL interviews were attempted for 1988 residents, stratified by cognitive functioning, from 40 nursing homes in five states. Likert-type response options were used with reversion to dichotomous responses when necessary; z-score transformations were used to combine the formats. Tests of internal consistency and confirmatory factor analysis were performed; cluster analysis was used to shorten the scales. Correlations between domain scores were examined, and tests of convergent validity performed. Analyses were repeated for subgroups based on cognitive functioning levels. Results. Long QOL scales were constructed for 1316 of the 1988 residents, including many with substantial cognitive impairment. Confirmatory factor analysis confirmed 10 QOL domains. Cronbach alphas ranged from .76 to .52. The majority (93%) of the 45 possible interscale correlations among domains were below .14 and the rest were between .4 and .5. QOL scales were correlated with, but distinct from, residents' emotions ratings and overall satisfaction, and each was correlated with a corresponding summary rating for the domain. Conclusions. QOL can be feasibly measured from resident self-report for much of the nursing home population, including cognitively impaired residents. Additional research is suggested on the measures, but the approach has promise for regulation, continuous quality improvement, and public information.

This article contains summaries of earth science research in various disciplines during 2000. These include work about seismology, volcanoes, geothermal energy, plate tectonics, metamorphism, clastic and carbonate sediments, mineralogy, hydrogeology, caves and karst, geologic mapping and geomorphology, geochemistry, and economic geology.