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Michael de [email protected]
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Lineaments & axes of Woolridge (1923 & 1926)(1) Woolridge & Linton (1939 & 1955)(2)
(1) The minor structures of the London Basin Proc. Geol. Assoc.,34,:175-193
The structural evolution of the London Basin Proc. Geol. Assoc.,37,:162-192
(2) Structure, surface & drainage in S. E. England, George Phillip.
2Michael de Freitas
From A to Z Map 35 miles around London – 1:133 000. Based on O. S. Maps
Overlay of Woolridge Lineaments on A to Z map3Michael de Freitas
REGIONAL GUIDE 1947
4Michael de Freitas
REGIONAL GUIDE 19965Michael de Freitas
Key Major syncline ads for the basin Minor syncline Anticline Axial trace uncertain Dome Fault
Key Major synclinal axis for the basin Minor syncline axis Anticline Axial trace uncertain Dome Fault
0 5 10 km
Map of Chalk beneath Eocene Water Resources Board, 1972
0 m
50 m
100 m
0 m
150 m
100 m
50 m 0 m
6Michael de Freitas
From Barton 1982. The lost rivers of London7Michael de Freitas
Map 6 – A map showing the tributaries of the Thames from Kingston to Erith 8Michael de Freitas
Map 6 – A map shoing the tributaries of the Thames from Kingston to Erith 9Michael de Freitas
Key Major syncline ads for the basin Minor syncline Anticline Axial trace uncertain Dome Fault
Key Major synclinal axis for the basin Minor syncline axis Anticline Axial trace uncertain Dome Fault
0 5 10 km
Relationships of the “domes” of Water Resources Board
interpretation of Chalk surface beneath the Eocene and lineaments
of Thompson, 1997 Map of Chalk beneath Eocene Water Resources Board, 1972
10Michael de Freitas
Kilometres
10 8 6 4 2 0 5
London BasinCurrent ChalkGroundwater levelsJanuary 1996(metres OD)
10
00
90
80
70
00 10 20 30 40
+40
+20
00
-20
-40
+20
+40
11Michael de Freitas
From A to Z Map 35 miles around London – 1:133 000. Based on O. S. Maps
Overlay of Thompson’s Lineaments on A to Z map Overlay of Berry & Wakeling QJEG Data on A to Z
Greasy backs ward etal. Geotech. 9 12Michael de Freitas
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NORTH
ALPINE
Woolridge & Linton monocline axes
Woolridge fold axes
Woolridge fold axes
Ameen faults
15Michael de Freitas
Pull-apart basins with “ups” and “downs”
+
- ++
+++
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MonteBello4.jpg - Undulating hills and ravines along Upper Stevens Creek Valley are a result of pressure ridges, pull-apart (sag) basins, and shutter ridges along the San Andreas Fault. USGS 17Michael de Freitas
Tim Newman 2008 18Michael de Freitas
Geotechnical Parameter
Depth
Such a spread may have a number of causes other than lithology, moisture content and sampling
Effects of Compartments
19Michael de Freitas
Ballantyne. C. K., Harris. C., The Periglaciation of Great BritainISBN 0-521-310164
Devoy. R. J. N., 1995, Deglaciation, Earth crustal behaviour and sea level changes etc. in Preece. R. C. (ed.) Island Britain: a Quaternary perspective. Geol. Soc. Spec. Labs. 96: 181-208ISBN 1-897799-32-2
Fig. 10. Relationships of ice loading and expected forebulge development (after Dawson 1992)
20Michael de Freitas
Maurits Cornelis Escher (1898-1972)
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