156 
LIAS OF ENGLAND AND WALES.' 
a greater thickness of Lower Lias than is known elsewhere in 
this country. The boring, which was commenced in the Middle 
Lias, was carried through the Lower Lias, and Rhaetic Beds, into 
the Keuper Marls. It was originally undertaken with the object 
of finding water, and when no supply was obtained, Mr. Hamilton 
resolved to continue the boring as a scientific enterprise ; but it 
was abandoned soon after the Keuper Marls were reached. The 
work was carried out by Messrs. Le Grand and Sutcliff (1890-92) 
and the following are the particulars of the strata passed 
through : 
SECTION AT MICKLETON, GLOUCESTERSHIRE. 
[Old Dug Well, 45 feet ; the rest bored. Cores 8 inches to 2 inches in 
diameter.] 
THICKNESS. DEPTH. 
FT. IN. FT. IN. 
"Marlstone : ferruginous earthy lime- 
stone, with Cardium, Modiola 
scalprum, and Pinna - - 36 
(Beds not noted : portion of old dug 
well) - - - .9 45 
Hard bluish-green rock . 13 58 
Loamy sand and stone - 3 61 
Hard sand, with bands of stone - 19 80 
Blue shale and clay - - - 13 93 
Blue stone - - - 3 96 
Brown rocky sand - - 50 101 
Hard blue marly clay, with nodular 
limestone, and iridescent shells : 
Ammonites fimbriatus, Cardium 
truncatum, Modiola scalprum, and 
Crustacean - - - 179 280 
Middle Lias. 
280 feet. 
529 
532 
Lower Lias. 
961 feet. 
"Hard blue marly clay, with occasional 
nodules of limestone, and irides- 
cent shells : Ammonites capri- 
cornus, and Pleuromya costata - 249 
Hard blue clay, with bands of stone - 3 
Hard blue clay and shells : Ammonites, 
Amberleya, Cryptania, Gryphaa 
arcuata,Inoceramus ventricosus, and 
Unicardium ? (crushed)- - - 296 828 
Limestone - - - 3 6 831 6 
Hard black shaly clay - - - 5 6 837 
Hard clay, with shells : Ammonites 
semicostatus at depth ef 870 - - 63 900 
Limestone - - 4 904 
Clay .with shells - - - . 12 916 
Limestones, marly clay, and shells, 
Am. semicostatus at 920 and 977 - 
Limestones and marls with shells : 
Encrinite stem at 1000 ; blue lime- 
stone and dark shales at 1073 
Limestones wiihAmmonites angulatus, 
A. Charmassei, and Rhynchonella 
calcicosta- -' - - 80 1092 
Limestones and marls, with occasional 
shells - - 44 1136 
Pale limestone - - 2 1136 2 
Limestone - - 12 10 1149 
Blue shaly limestone with Cardinia 
and Lima - - 6 1155 
^Limestones, freer nutting - - 86 1241 
76 992 
- 92 1084 
