Norwich Geological Society. 231 



pots Glacial debris, and recent deposits. The shore is remarkable, 

 also, botanically, plants being found there rare or unknown in other 

 parts of Scotland, of which a list was given by the author. Alto- 

 gether, the Arbigland shore seems worthy the attention of the geo- 

 logist, botanist, antiquarian, and tourist. G. A. P. 



Norwich Geological Society. — The monthly meeting of this 

 Society was held on March 4th. The Eev. J. Gunn, F.G.S., 

 President, in the chair. 



A tooth of Mosasaurus in a flint, found by Mr. J. E. Taylor, was 

 exhibited by the Honorary Secretary. 



The President stated that some of the bones found on the site of 

 the King's Lynn Dock were those of a large wader, most probably 

 a Crane. Professor Newton considered that the largest tibial bone 

 probably belonged to the large extinct Crane, figured and described 

 by M. Milne Edwards. 



Mr. P. W. Harmer communicated a paper " On the so-called Crag 

 of Belaugh and Weybourne." The author said it was generally 

 held by geologists that the Norwich Crag was the Fluvio-marine, or 

 estuarine equivalent of the upper part of the Red Crag wliich oc- 

 cupied the country in Essex and the South of Suffolk, the head of 

 the estuary which thus opened out to the Eed Crag Sea being some- 

 where near Norwich, and was separated from the Norwich Crag by 

 a ridge of Coralline Crag, an instance having been found of the beds 

 in contact. Between the head of the estuary at Norwich and the 

 Eed Crag district, several exposures of the Fluvio-marine crag 

 occurred, as for instance in the neighbourhood of Hales worth and 

 at Alborough, near which place it was stopped by the Coralline 

 Crag. The land subsiding to a greater extent, the estuary became 

 an arm of the sea, and the water then extended as far as, or perhaps 

 beyond, Horstead, because the Crag that occurred there contained 

 Fluvio-marine shells. The Chillesford Crag and Clay seem to have 

 overlapped the Norwich Crag. Above them come a series of beds 

 which Mr. Searles Wood, Jun., and the author, termed the pebble 

 beds, which are in some places fossiliferous. These pebble beds 

 seem to have eroded, and occasionally destroyed the Chillesford 

 Clay. In some places near Norwich they are from 40 to 50 feet 

 thick. 



A careful examination of the Crag in the Bure Valley, exposed at 

 Horstead, Coltishall, and Burgh, has led Mr. Searles V. Wood, Sen., 

 to the conclusion that we have in that deposit a more Fluvio-marine 

 form of the Chillesford Shell-bed, which is now generally held to 

 include, besides the deposits of that place, the Crags of Aldeby, of 

 Easton Cliif, and the Upper Bed at Thorpe and Bramerton; the 

 depression which introduced the Chillesford beds, and covered the 

 Norwich or Fluvio-marine Crag at Thorpe and Bramerton with a 

 deposit containing exclusively marine shells, having thus carried the 

 head of this ancient estuary further north — from Norwich to near 

 Aylsham. 



More than twelve months ago, Mr. Gunn called the author's atten- 



