File:YGS CHR 05 FLUV FIG 03.jpg

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English: Figure 3 (a) Gamma-ray geophysical log correlation of wells between South Oldenburg and the Ems area of northern Germany to show the first-order scale of cyclicity in the upper Bolsovian to lower Westphalian D successions (composite diagram with modifications from figure 63 in David 1990 and from Hedemann et al. 1984). Bases of first-order cycles are shown as solid lines, whereas second-order cycles are shown as dashed lines. Note: only general correlation of cycles can be carried out at this well spacing, although a possible third-order correlation is shown between wells Bockraden 6 and Osnabrück–Holte Z1. Position of coals is marked for Bockraden 6. (b) Gamma-ray geophysical log correlation of wells from the South Oldenburg area of northern Germany to show the lateral correlation of sandbodies in second- and third-order cycles (redrawn with modifications from fig. 57 in David 1990). Bases of second-order cycles are marked as solid lines, whereas third-order cycles are shown as dashed lines. Note: good correlation of channel belts exists at this well spacing. Locations of these wells can be made with reference to Rehden 21 in Figure 3a.
From: Carboniferous hydrocarbon resources: the southern North Sea and surrounding onshore areas, edited by J. D. Collinson, D. J. Evans, D. W. Holliday, N. S. Jones. Published as volume 7 in the Occasional Publications series of the Yorkshire Geological Society , Copyright Yorkshire Geological Society 2005.
source Yorkshire Geological Society
author Neil S. Jones and Brian W. Glover

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Carboniferous hydrocarbon resources: the southern North Sea and surrounding onshore areas

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Attribution statement: Image from 'Carboniferous hydrocarbon geology.' Yorkshire Geological Society 2005. www.yorksgeolsoc.org.uk

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