Reviews—Memoirs Geological Survey—East Lincolnshire. 31 
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I. —Memorrs or THE GeEotogicaL Survey. Ene@nuanp anp WALES. 
Tue Geotocy or Parr or Hasr Lincoimnsuire. By A. J. 
JuKES-Browne, F.G.S. 8vo. pp. 181, with 25 Woodcuts and a 
Plate of Sections and Map. (London, 1887.) 
HIS memoir treats of the geology of the country near the towns 
of Louth, Alford, and Spilsby, and is the official Explanation 
of Sheet No. 84 of the Geological Survey Map of Great Britain. 
In a concise introductory note the Director-General tells us that the 
district of which the geology is here described is the southern half 
of the Wolds, north of the Wash; and that the Memoir gives (1), 
a detailed account of the various Formations from the Kimeridge 
Clay to the top of the Middle Chalk. (2.) The subdivisions estab- 
lished by Professor Judd among the Lower Cretaceous (Neocomian) 
rocks of Lincolnshire have been adopted by the Geological Survey, 
as well as his name of “ Tealby Beds” for the Middle Division of 
that series. The name of ‘Spilsby Sandstone” is proposed for the 
Lower Division. The Upper Group, or “ Carstone,” here generally 
consists of mere loose sand. The several subdivisions of the Chalk 
in this region are now for the first time compared with those which 
have been worked out by the Survey in Buckinghamshire and 
Cambridgeshire. (8). A full description is likewise given of the 
Glacial Deposits which occupy the lower grounds flanking the Wolds ; 
but for his theoretical views, which are not always in accord with 
those of his colleagues, the author of the Memoir is himself respon- 
sible. In connexion with the superficial deposits, he has discussed 
the comparative age of the several valley-systems of the district. 
(4). Among the facts of economic importance described in the 
Memoir is the discovery of two horizons of ironstone and also a seam 
of phosphatic nodules. (5). A large number of well-sections bear- 
ing on the subject of Water-supply are given in the Appendix. 
A general description of the geological structure and the physical 
characters of the district is first given, with lists of the heights, and 
some sections (pp. 1-8). The Kimeridge Clay is then described 
(pp. 9-12). The so-called Neocomian Series (pp. 13-27) begins 
with a nodule-bed on the Kimeridge Clay and at the base of the 
Spilsby Sandstones, which latter alone the author refers to the 
Neocomian of the Continent, whilst others make it the lower part of 
that series. The nodules consist largely of rolled fossils, difficult to 
determine, but for the most part derived from older beds, probably 
Kimeridgian (p. 18), but possibly Neocomian (p. 139). 
The sandstone has large calcareous, fossiliferous concretions in it ; 
and the fossils comprise both Oolitic and Neocomian forms, indicating 
an intermediate stage between the two systems (p. 141). 
Then follows the variable Hundleby Ironstone, equivalent to that 
at Claxby, and forming the base of the Tealby Clay. This iron- 
stone is a ferruginous loam with oolitic grains of iron-oxide; and 
the facies of its fossils ‘is characteristically Neocomian” (p. 141). 
The “Tealby Beds” are (1) the ironstone above mentioned; (2) 
