EXPLANATION OF THE PLATES. 



Plates I., IL & IIL 



Illustrate Dr. Buckland and Mr. De la Beche's paper on the Geology of the neighbour- 

 hood of Weymouth and the adjacent parts of the coast of Dorset. 



Plate L 



Geological Map of the neighbourhood of Weymouth and the adjacent parts of the coast 

 of Dorset. 



The reader is requested to take notice that the authors do not profess to mark the 

 exact limits of the lower Purbeck Beds in Portland, but merely to indicate their presence 

 as the uppermost formation in the north end of that island. 



Plate IL 



Series of Sections. — Colours the same as in the Map. 



Fig. 1. Section from the Great fault near Upway to the Bill of Portland*. 



Fig. 2. Section from the Great fault near Moigne's Down Farm to Ringstead Bay. 



Fig. 3. Section from the Great fault near Poxwell to the signal station near Osmington 

 Mills. 



Fig. 4. Section from the Great fault near Sutton to the Sea at Ham Cliff. 



Fig. 5. Section from the Great fault near Sutton to Jordon Hill in Weymouth Bay. 



Fig. 6. Section from Abbotsbury Common over Linton Hill. 



Fig. 7. Section from Abbotsbury Castle to Abbotsbury Swanery, showing the continua- 

 tion of the Great fault. 



Fig. 8. Coast section from Jordon Hill to near Boat Cove. The apparent curvature in 

 the Oxford Clay and other strata at the east end of this section arises from an inden- 

 tation of the coast : the strata have an E. and W. direction throughout, and dip 

 rapidly N., and have not the bend here represented, by throwing the curves of the 

 coast into a straight line. 



Fig. 9. Coast section from near the termination of fig. 8 to Ringstead Bay. As the coast 

 ranges along the line of direction of the strata, its indentations give these strata a false 

 appearance of dipping in different directions : they form a small arch at Osmington 

 Mills. 



* The Scale (in length) of fig. 1 . is one inch to the mile ; of fig. 2. to 10. inclusive, two inches to 

 the mile: figs. 11. to 13. inclusive are on a larger scale, and fig. 14. two inches to the mile. 



