A HISTORY OF DEVONSHIRE 



In the clay bed the Rev. W. Downes* found Inoceramus concentricus, 

 Pecten quadricostatus, Actaon affinis, and other shells. 



The Rev. W, Downes divided the Greensands of the Blackdowns 

 and the Haldons into 1 5 zones or beds, numbered from the base upward, 

 as follows in brief abstract : — 



Bed 15. Ori/W/W chert, local, seen at Smallacombe Goyle, Little Haldon ; in layers. 



6 feet. 

 Bed 1 4. Schorlaceous sand not glauconitic. Exogyra occasional, Haldon. 8 feet. 

 Bed 13. ' Littoral concrete ' of Prof. Duncan. Three shell beds in sand. Exogyra 



abundant. Trigonia vicaryana, Vermicularia. (? about 2 feet). 



The above he considered to be higher than the Blackdown beds. 



Bed 12 



Haldon. Sand with several layers of cherty sandstone. Pecten quadricostatus 



and Exogyra abundant. About 35 feet. 



Blackdown. Sand with layers of cherty sandstone passing upwards into 



chert. Pecten quadricostatus characteristic. About 25 feet. 



Bed II. Variegated fine sand with thin impersistent shell bands, fossils broken and 



waterworn. Pectunculus sub/avis and Trigonia affinis abundant. 1 8 feet. 



Bed 10. (Fitton's bed i) Very fossiliferous sandstone layers with sand partings. 



Cyprina cuneata, Exogyra conica, common ; Trigonia scabricela, probably 



characteristic. About 3 feet. 



Beds I o and 1 1 were thought to have a meagre representation at 

 the base of the Greensand of the Haldons. Jukes-Browne * considers 

 bed 1 3 represented in bed 1 2 Blackdown ; Haldon bed 1 2 to be 1 1 , not 

 35, feet; that bed 14 is above 15, and that both are partly, or altogether, 

 represented by the chert beds on the Devon coast. 



Bed 9. (Fitton's bed 2) Thin layer of concretions used for scythestones. ' Hard 



fine vein.' 

 Bed 8. /■ Very fossiliferous bed in sand, Turitella granulata the prevailing fossil. 

 Bed 7. \ As above, Pectunculus umhonatus prevalent. Murex calcar often perfect. 



In beds 7 and 8 (together corresponding to Fitton's bed 2) the fos- 

 sils occur in clusters and have evidently been deposited in still water. 

 The beds blend, though generally found in the order given. Their 

 united thickness is about 4 feet. 



Bed 6. (Fitton's bed 4) Sand with concretionary layers; few fossils including 

 Inoceramus sulcatus, Pectunculus umhonatus ; known as ' Gutters.' About 5 

 feet thick. 



Bed 5. Known as ' Burrows.' Concretionary beds divided by sand layers and used 

 for building purposes, sometimes for whetstones. Few fossils, chiefly 

 Inoceramus sulcatus and Trigonia aliformis. About 4 feet. 



Bed 4. (Fitton's bed 6) 'Bottom stones,' concretions used for whetstones. Pec- 

 tunculus, Inoceramus and Trigonia as above. From a few inches to 5 

 feet. 



Bed 3. (Fitton's 'Rock-sand' bed 7) 'Bottom rock,' sand, few fossils including 

 Trigonia aliformis. About 4 feet. 



Bed 2. (Fitton's bed 8) Thin layer (a few inches) of concretions used for scythe 

 stones. ' Soft fine vein.' 



Beds 9 to 2, inclusive, have formerly been largely quarried for 

 whetstones on Punchey Down. 



' Geol. Mag. July 1886, pp. 309,310. » Op. cit. p. 225. 



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