FOG L. Richardson—Great Oolite, Oxfordshire. 
Upper Srace. 
crinoid-ossicles. 
GREAT-OoLITE SEQUENCE AT Groves’ Quarry, Mitton, OxForRDSHIRE. 
Thickness in 
Limestone and some marl, white, rubbly. This rubble (and 
that of the bed below when it comes near the surface) assumes 
a yellow colour, and one or the other or both (i.e. 1 and 2) 
constitute the cap to the section : about : 
Limestone, white and pale-brown, finely oolitic ; Anabacia 
complanata (Defr.), not uncommon; Montlivaltia caryo- 
phyllata, Lamx., Montlivaitia sp., Thamnastrea lyelli, 
E. & H., Ch ypeus milleri, Wright, Echinobrissus woodwardi, 
Wright, Volsella imbricata (Sow. ) ‘and Ti igonia costata, Sow. 
3 Marl, pale- brown, rather sandy, with brown and black pieces of 
lignite and occasional limestone pebbles 
a. Marl, greyish-white (clayey and darker at the top); indurated 
in places; Lucina bellona, d’Orb., and Unicardium varicosum 
(Sow.) : 
d. eae white, rubbly, non- -oolitic and impersistent : in 
places yellow-stained. When weathered forms a conspicuous 
yellow wavy band at the base of Bed 4a; Strophodus magnus, 
Agassiz, Lhamnastr ea lyelli, KH. & Tei ?Isastrea limitata 
(Lamx.), 2 Trochotoma, Natica, Ter ebratula maxillata auctt., 
Camptrnectae rigidus (Sow.), Grammatodon hirsonensis 
(VArch.), Ostrea sowerbyi, M. & L., Lima cardiiformis 
(Sow.) y olsella imbricata (Sow.): 4 to 8 inches . 
Man of Z greenish tinge weathering white ; apparently unfossili- 
if ferous. The white colour of this bed, the yellow band (48), 
it and the top darker marls (4a) are very conspicuous in 
a weathered face: about 
( TEREBRATULA - BeDs. — a. Limestone, white, sparsely- oolitic, 
crowded with Zerebratula maxillata auctt., in places; Clypeus 
mulleri, Wright, Hemicidaris bravenderi, Wright (and large 
| detached radioles probably belonging to this species), Acro- 
salenia spinosa, Agassiz, Echinobrissus woodwardi, Wright, 
Eryma elegans, Oppel, Natica, Nerinea, Rhynchonella sp., 
Serpula tricarinata, Sow., Camptonectes lens (Sow.), C. annu- 
latus (Sow.), Ceromya concentrica (Sow.), @. Symondsi, 
M. & L., C. undulata, M. & 1u., Gervillia cf. waltoni, Lycett, 
Grammatodon hirsonensis (d’Arch.), Lueina bellona, @Orb., 
64 Ostrea costata, Sow., Lima cardiiformis (Sow.), Protocardia 
subtrigona (M.& L.), Zhracia curtansata, M. & L., and 
' Volsella imbricata (Sow.)  . : : 
b. Marl, greenish, with a yellow layer at the base. In places 
the bed above is joined on to the bed below, and when such is 
the case the top portion of that bed (6c) becomes very fossili- 
ferous, containing many of the fossils of the bed above (6a) ; 
otherwise it is rather barren: 1 to 3 inches . 
. Frrst Brock Brep.—Limestone, white, sparsely but coarsely- 
oolitic, massive, weathering into blocks ; Clypeus mulleri, 
Wright (common), Rhynchonella sp. (same form as in 6a) 
( Marl, ereenish - -grey in the upper two-thirds, becoming browner 
i 
5 
a 
is) 
in the lower third, with a general tendency to weather white ; 
apparently rather barren of fossils 
fis ete 
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3° 10 
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1 From beds 4, 5, or 6 come some peculiar little objects that somewhat resemble 
Mr. W. D. Lang informs me, however, that they are concretions, 
‘¢and similar ones are common in the chalk. Stripes on the sides are said to be 
slickenside structure, and the whole comparable with cone in cone structure.”’ 
In this paper, when a query precedes the generic name, it indicates doubt about 
the genus haying been accurately diagnosed. 
