Abstract The large volume of deep groundwater in the Precambrian crust has only recently been understood to be relatively hydrogeologically isolated from rest hydrologic cycle. paucity permeability measurements below 1.3 km is a barrier modeling fluid flow and solute transport these low porosity environments. Whether permeability-depth relationships derived shallower than can extended greater d...

The relationship between the denaturation temperatures of proteins (Tm values) and the living temperatures of their host organisms (environmental temperatures: TENV values) is poorly understood. Since different proteins in the same organism may show widely different Tm's, no simple universal relationship between Tm and TENV should hold, other than Tm≥TENV. Yet, when analyzing a set of homologou...

Chapman, D.S. and Pollack, H.N., 1977. Heat flow and heat production in Zambia: evidence for lithospheric thinning in central Africa. In: A.M. Jessop (editor), Heat Flow and Geodynamics. Tectonophysics, 41: 79-100. Heat-flow results from eleven widely spaced sites in central and western regions of the Republic of Zambia range between 54 and 76 mW rnm2. Ten of the sites are located in late Preca...

The Upper Mississippi Embayment (UME), where the seismically active New Madrid Seismic Zone resides, experienced two phases of subsidence commencing in the Late Precambrian and Cretaceous, respectively. To provide new constraints on models proposed for the mechanisms responsible for the subsidence, we computed and stacked P-to-S receiver functions recorded by 49 USArray and other seismic statio...