𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Geophysical investigations in the Vale of Clwyd

✍ Scribed by C. D. V. Wilson

Book ID
102846238
Publisher
John Wiley and Sons
Year
1961
Tongue
English
Weight
1019 KB
Volume
2
Category
Article
ISSN
0072-1050

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

A seismic refraction survey has shown three layers below the drift, correlated with Trias, Upper Carboniferous and Carboniferous Limestone, respectively. The thicknesses of the first two have been estimated. A detailed gravity survey has been co‐ordinated with three of the four seismic lines. One of the faults on the west of the Vale has been traced by the gravity survey for 11/2 miles and identified on a seismic line. It is shown to be either a single fault of 700 feet throw and approximately 45Β° hade, or else two or more step‐faults. The first arrival times at this line can all be explained on the simple ray theory with the assumption of wave diffraction. The significance of the later arrivals is discussed.

The Vale is shown to be divided into basins of Trias by the faults on the west side, but the Vale of Clwyd fault on the east side is continuous.

πŸ“œ SIMILAR VOLUMES

A geophysical interpretation of the stru
A geophysical interpretation of the structure of the Vale of Clwyd, North Wales
✍ F. A. Collar πŸ“‚ Article πŸ“… 2007 πŸ› John Wiley and Sons 🌐 English βš– 581 KB

## Abstract Detailed gravity and resistivity surveys have been made in the Vale south of Denbigh, and from the combined interpretations a Trias isopachyte map has been produced. The gravity interpretation indicates that the en echelon faults of the western side extend across to the Vale of Clwyd fa