Preliminary geologic map of some Upper Cretaceous and Paleocene rocks and Quaternary deposits, Bairoil quadrangle, Carbon and Sweetwater Counties, Wyoming

1968 ◽  
Author(s):  
Mitchell W. Reynolds
Keyword(s):  
Upper Cretaceous ◽  
Quaternary Deposits ◽  
Geologic Map

scholarly journals REMARKS ON THE KARSTIFICATION IN THE WIDER AREA OF THE UPPER MESSINIA CLOSED HYDROGEOLOGICAL BASIN (SW PELOPONNESUS, GREECE)

2017 ◽  
Vol 43 (4) ◽  
pp. 1785 ◽  
Author(s):  
I. Mariolakos ◽  
E. Spyridonos
Keyword(s):  
Water Flow ◽  
Upper Cretaceous ◽  
Fault Zones ◽  
Karstic Aquifer ◽  
The South ◽  
Quaternary Deposits ◽  
The North ◽  
Hydraulic Conditions ◽  
Underground Flow ◽  
Hydrogeological System

The Upper Messinia Basin is part of the Kalamata - Kyparissia graben structure, defined by two fault zones, one of E-W direction to the north and one of N-S direction to the east. The Tripolis and the Pindos alpidic units build up the basement of the region, and are covered by post-alpidic Pleistocene and quaternary deposits. The Basin is a closed hydrogeological system. In the upper cretaceous Pindos limestones, we observe two different karst types, according to drilling results. In the western part of the basin, where the limestones appear on the surface, the merokarst type is observed and water flow is limited in separated karstic conduits. On the contrary, in the central part of the basin, where the limestones underlie the clastic post-alpidic formations, the holokarst type is observed and a rich karstic aquifer is developed. This is explained by the closed hydraulic conditions. In the western part of the basin the karstic aquifer is unconfined, while in the central part it is confined, due to the overlying impermeable post-alpidic sediments and the overall closure of underground flow to the south. It appears that the confined conditions led to the development from merokarst to holokarst in this region.

Dynamic Periods and Building Damage at Charleston, South Carolina during the 1886 Earthquake

2008 ◽  
Vol 24 (4) ◽  
pp. 867-888 ◽  
Author(s):  
Cedric D. Fairbanks ◽  
Ronald D. Andrus ◽  
William M. Camp ◽  
William B. Wright
Keyword(s):  
South Carolina ◽  
Shear Wave Velocity ◽  
Response Spectra ◽  
Small Strain ◽  
Spectral Ratios ◽  
Quaternary Sediments ◽  
Quaternary Deposits ◽  
Geologic Map ◽  
Velocity Information ◽  
Isopach Map

Fundamental dynamic periods of Quaternary deposits beneath the peninsula of Charleston, South Carolina, are characterized spatially using an updated isopach map of Quaternary thickness, characteristic small-strain shear wave velocity information, a 1:24,000 geologic map, and a simple approximating equation. The updated isopach map is developed from subsurface information from 266 investigation sites. Estimates of fundamental periods for the Quaternary sediments primarily range between 0.3 and 0.7 s. These periods are lower end estimates of actual ground periods, based on a comparison with modeled response-spectra ratios. Estimates of fundamental periods range from 0.1 to 0.4 s for over 95% of the buildings present in 1886. Thus, the overlap between the range of building periods and the range in periods corresponding to high spectral ratios is not great. This finding agrees with the observation of Marciano and Elton that damage was independent (or only slightly dependent) of building height.

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