o 
O 
M 
O 
1 
a 
106 LOWER OOLITIC ROCKS OF ENGLAND : 
unconformity both between the Sand and Upper Lias clay, and 
between the Sand and Inferior Oolite. 
Proceeding northwards the following section of a quarry, near 
the Rectory at Horton, will show the general character of the 
beds : 
FT. IN. 
("White Oolite .... about 8 
f Oolitic limestone with Terelratula- 
IClypeus I bed at base, T. globata and Nerincea 
. s - , Grit. I Gutsei - - - - 8 
stones, iRubbly and marly oolite - - 1 
rHard shelly and oolitic limestones 
TrigoniaJ with Trigonia costata, Trichites, 
Bed. | Rhynchonella concinna. R, spinosa, 
I &c.- - - - 3 
fOolitic freestone, bored at top, 
1 current-bedded in mass and in 
Freestones - J the^ndividu.l layers ; shelly in ^ ^ 
1 Nodular marly layer with Gresslya 
(^Freestone ... aboufc 2 
The Cephalopoda Bed, consisting of sandy and iron-shot lime- 
stones and marls, was to be observed below the level of the 
Freestone to the north-west of the Ancient Encampment at Little 
Sodbury, and again in the combe east of Horton church. From 
this bed I obtained Ammonites opalinus, A. radians, A. striatulus, 
and A. dispansus. 
The strata in this neighbourhood have been described by Dr. H. B. Holl 
who assigns a thickness of 8 feet to the Cephalopoda Bed.* Mr. S. S. 
Buckman has published a detailed section of the strata at Little Sodbury. f 
Mr. Hudleston has likewise given an account of the Horton quarry, and 
mentioned some of the fossils above enumerated. He obtained many 
Gasteropoda from the bottom layer of the Eagstone.J He remarks that 
the absence of any representative of the zone of Ammonites humphriesianus 
appears to be complete. 
North of Hawkesbury the outcrop of the Inferior Oolite is less 
regular, for the escarpment is intersected by deep ramifying 
valleys, and the rock caps the straggling but bold promontories of 
Nibley Knoll and Stinchcombe Hill, the latter perhaps the finest 
of the Cotteswold Hills. The same general divisions may be 
noticed in, the Inferior Oolite Series, northwards as far asDursley. 
In ascending the hill north of Wotton-under-Edge, by the lane 
north-west of the town, a fine section of the Cotteswold Sands 
and Cephalopoda Bed, was exposed in the deep lane-cutting. 
The Sands, shown to a depth of 25 feet, present their ordinary 
characters of yellow micaceous sand, with little or no calcareous 
matter, except in the bands of calcareous sandstone. They are 
surmounted by nearly 12 feet of marly iron-shot limestones, 
* Quart. Journ. Geol. Soc., vol. xix. p. 310. 
t Inf. Ool. Ammonites, p. 164. 
j Introd. to Gasteropoda of the Inf. Oolite (Palscontogr. Soc.), p. 57. 
