Honey Hill Fault and Hunts Brook Syncline

Guidebook for field trips in Connecticut and adjacent areas of New York and Rhode Island: New England Intercollegiate Geological Conference 77th annual meeting, Yale University, New Haven, Connecticut, October 4-6, 1985: Trip C

Recessional Moraines, Southeastern Connecticut

Guidebook for field trips in Connecticut and adjacent areas of New York and Rhode Island: New England Intercollegiate Geological Conference 77th annual meeting, Yale University, New Haven, Connecticut, October 4-6, 1985: Trip A

Bedrock Geology of Eastern Connecticut

Guidebook for field trips in Connecticut: New England Intercollegiate Geological Conference 60th annual meeting, Yale University, New Haven, Connecticut, October 25-27, 1968: Trip F-

Managing Scarce Resources in Training Projects

Every training organization has a limited amount of people, time and/or money available to complete a project, and this limited resource availability undoubtedly will affect the scope and success of projects the organization undertakes. Busby and Goldsmith discuss the knowledge and skills thing in the instructional design field will need to successfully address these circumstances. The authors begin the chapter by defining what they mean by resources and resource scarcity, and then go on to describe how resource availability and the scope of a project affect one another. They then discuss such basic economic concepts as supply and demand and the economic cycle, factors that have a profound influence on resource availability. The authors then conclude by providing strategies a training manager can adopt to address the problems presented by resource scarcity

Evaluation of Subsurface Flow in Fissured Sediments in the Chihuahuan Desert, Texas

Fissures are surface features, or gullies, some of which are underlain by sediment-filled fractures. A previous study of subsurface flow beneath a fissure showed higher water fluxes beneath the fissure, which was attributed to infiltration of ponded water in the fissure. This study was conducted to investigate the vertical and lateral extent of increased flow associated with fissured sediments, to compare subsurface flow beneath fissures of different maturity, and to examine different techniques for evaluating flow in fissured zones. Boreholes were drilled directly beneath four fissures and at distances of 10 m and 50 m from the fissures, and soil samples were analyzed for various soil physics parameters and environmental tracer distribution. Electromagnetic induction was used to map apparent conductivity in transects perpendicular to the fissures. Fissures had higher water potentials and lower chloride concentration than surrounding sediments. Zones of high flux were restricted to the area directly beneath some fissures, whereas others also had high fluxes in the profiles 10 m distant from the fissure. Water potential and chloride fronts were found beneath two of the fissures in the upper 20-m zone, which indicates that most of the flow occurred in this zone. Water flux estimates, based on the position of the chloride front and an assumed age of the fissures of 50 yr, ranged from 28 to 48 mm yr^-1. High tritium levels were found throughout the fissured profiles (to maximum depth of 26.4 m) and in some cases in the profiles 10 m distant from the fissure, indicating post-1952 water. The occurrence of high tritium levels beneath the chloride front in one fissure indicates that some of the water is flowing preferentially. Minimum estimates of water flux based on the tritium data ranged from 28 to 120 mm yr^-1. Stable isotopes of oxygen and hydrogen were less enriched beneath the fissure, which is consistent with higher fluxes beneath the fissure. Plant water potentials were of limited use in delineating fissure flow. Apparent conductivities were higher across two fissures, whereas the other two fissures did not show any variation in apparent conductivity. The higher conductivity in some fissures is attributed to higher water content. Multiple independent lines of evidence indicate that subsurface water fluxes are higher beneath fissures.Bureau of Economic Geolog

Evaluation of Preferential Flow in Playa Settings Near the Pantex Plant

Analysis of water movement through the unsaturated zone is critical for understanding recharge and contaminant transport at DOE's Pantex Plant. Although preferential flow pathways such as root tubules, cracks, and fissures (Seven, 1991) may not be important volumetrically from a groundwater recharge standpoint, such flow may play a critical role in rapidly transporting contaminants to the groundwater and bypassing much of the soil matrix. Previous studies found that flow along preferential pathways may be up to two orders of magnitude higher than that predicted by homogeneous flow models (Richard and Steenhuis, 1988). In order to accurately evaluate pathways for contaminant transport, it is necessary to understand the spatial distribution of preferential flow pathways. The objective of this study was to delineate the spatial distribution of preferential pathways and evaluate the controls on such pathways.Bureau of Economic Geolog

The Chain Lakes Massif and its Contact With a Cambrian Ophiolite and a Caradocian Granite

Guidebook for field trips in southern and west-central Maine, October 13, 14 and 15, 1989: New England Intercollegiate Geological Conference 81st annual meeting: Trip B-