The Quarterly journal of the Geological Society of London . ^ minerals. Along the western outcrop) the highest percentage of heavyminerals, with a specific gravity of 2*77 and upwards, is at Gorse-thorpe. From Grorsethorpe a diminution in the percentage iscontinued northwards, hy way of Carburton, to Bawtry. South ofG-orsethorpe the fall in the percentage of heavy minerals is continued,.by way of Python Hill, to Nottingham. Along the eastern outcrop we find the, highest percentage atOllerton and Farnsfield. North of Ollerton to Retford there isa considerable decrease ; while from Farnsfield to
The Quarterly journal of the Geological Society of London . ^ minerals. Along the western outcrop) the highest percentage of heavyminerals, with a specific gravity of 2*77 and upwards, is at Gorse-thorpe. From Grorsethorpe a diminution in the percentage iscontinued northwards, hy way of Carburton, to Bawtry. South ofG-orsethorpe the fall in the percentage of heavy minerals is continued,.by way of Python Hill, to Nottingham. Along the eastern outcrop we find the, highest percentage atOllerton and Farnsfield. North of Ollerton to Retford there isa considerable decrease ; while from Farnsfield to Calverton, in thesouth, there is a marked diminution in the percentage of heavyminerals. The current-bedding.—At Retford and Ollerton i the pre-vailing dip of the cross-bedding is in an easterly direction. On ^ The Geology of the Countiy aroiiiid Olleitou Mem, Geol. Siirv. 1911,p. 23. Map of Nottinghamshire showing- the Pebble-Beds dotted Minor Current. [The white circles indicate the localities from Avhich sand has been obtainedfor separation purposes. The crosses indicate the position of the bore-holes -where the thickest proved parts of the Pebble-Beds occur.] Table showing the Localities, the Weight in grams, and thePercentage of the Heavy Minerals. Locality. Weight. Per-centage. Locality. Weight. \ J^ge. , Bawtry Carbtu-ton Gorsethorpe ...Python Hill ...Nottingham ... •1386-1438•3541-1536•1380 0-2440-253 0-6240-2700-243 ! Retford -0602 0-106 Ollerton -1560 j 0-275 Enfford -0765 | 0-134 Farnsfield -1530 j 0-269 Calverton -0296 i 0-052 part 4] MICROSCOPIC MATEIIIAF. of BL>TEli PEBBLE-EEDS. 333^ the IMansfield-Southwell biancli of tlie Midland liaihvay. betvN-eenMaiistield and Python Hill, 3 or 4 miles of excellent sections showmarked cross-bedding dipping In the district about Nottingham the dip of the false beddingshows a general direction to^^ayds the There are subordinate currents which c
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
