. Bulletin of the British Museum (Natural History), Geology. 174 M. G. LOCKLEY TUFF SHELL BEDS. ^Enlargement of succession shown box -HA3 H9 â H£2 _ufl -H41 »« -HUâH40--_[j£ -H39 =H5 -H3 -H2 -H38 -H1 r2m in below H43- / H44 ^TOAV/>fl ; 950 rH40 âH38 951 953 9 54 955 956 957 958 1-H30 â H28 D-H26 â Frondderw -H24 Ash -H22 -H20 -H18 = H 16 âH 14 EH 12 = H10" =-H 6 = H 2 20 m â 10m L 0 -H36 -H35 -H34 H33 H31 952 â MAP LOCALITES. Fig. 3 Sample points in the Afon Twrch section with inset map showing outcrop of sampled beds associated with shell beds and the Frondderw Ash
. Bulletin of the British Museum (Natural History), Geology. 174 M. G. LOCKLEY TUFF SHELL BEDS. ^Enlargement of succession shown box -HA3 H9 â H£2 _ufl -H41 »« -HUâH40--_[j£ -H39 =H5 -H3 -H2 -H38 -H1 r2m in below H43- / H44 ^TOAV/>fl ; 950 rH40 âH38 951 953 9 54 955 956 957 958 1-H30 â H28 D-H26 â Frondderw -H24 Ash -H22 -H20 -H18 = H 16 âH 14 EH 12 = H10" =-H 6 = H 2 20 m â 10m L 0 -H36 -H35 -H34 H33 H31 952 â MAP LOCALITES. Fig. 3 Sample points in the Afon Twrch section with inset map showing outcrop of sampled beds associated with shell beds and the Frondderw Ash in the upper reaches of Afon Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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