TRANSACTIONS OF THE SECTIONS. 95 
_Proportionate View and Tabular Order of Superposition of the 
re Members of the Grauwacke System of North Devon and 
omerset. 
| Floriferous and culmiferous sandstones and shales—a. An- 
thracite. F 
Wavellite schistus and limestones, the former cleaving into 
parallelograms, 
) Trilobite slates; abundantly fossiliferous, 
Wollacombe sandstones, and purple slates—containing fossil 
wood and plants. 
=| Morthoe quartz and roofing slates, with subordinate lime- 
stones. 
>> 
—— 
AAAS LAA 
WANES 
Hard, red, siliceous slate-rock of Trentishoe. 
Linton slates and limestones. 
b.Arenaceous slate, andconglomerate bed of limestone pebbles. 
“) Foreland and Dunkerry sandstones, thick bedded, coarse 
grained, and confluent. 
“| Doddington and Over-Stowey limestones. 
____.—.---) Foreland and Dunkerry sandstones. 
POOKIE 
Cannington Park limestone. 
Respecting this Section, and the distribution of the remains of 
_ plants in the several parts of it, the author enters into detail, and 
_ presents arguments in favour of his opinion, that the culmiferous series 
of Devon cannot be ‘separated from the subjacent rocks of the Grau- 
_wacke series, either by mineral characters, relation of strata, or 
organic reliquiz. His final conclusion, after a rapid comparison of the 
- Devon series of rocks and fossils with those of other districts, is thus 
_ expressed :—“ These several considerations, added to the strong colla- 
teral and positive testimony of the wood and plants from the Sherwell 
_ sandstones, throw such accumulated weight in the scale of the hypo- 
- thesis, that the culm and fossil flora of Devon belong at least to the 
upper Grauwacke (below the old red sandstone and mountain lime- 
stone), that he apprehends that geologists cannot hesitate to accept 
_ them provisionally as such, till far stronger facts and evidences than 
_ they are at present possessed of shall justify admitting them as a true 
‘contemporaneous equivalent for the carboniferous limestone proper, 
_ and its upper great coal field.” 
