388 Eminent Living Geologists — 



Lincolnshire belong to the Inferior Oolite, and not to the Great 

 Oolite as had been generally believed. Much confusion had arisen 

 through the correlation of the Colly weston Slate with the Stonesfield 

 Slate. These and other matters connected with the stratigraphy of 

 the Lower Oolites, and especially with the age and relations of the 

 Northampton Sands, were clearly expounded b}'' Professor Judd. 

 The acceptance of his views necessitated the revision of some of the 

 previously published maps of the Geological Survey, and during the 

 last year (1870-71) he was occupied on the Geological Survey he 

 carried his revisions as far as he was able from the neighbourhood 

 of Northampton into parts of Oxfordshire ; but much yet remains ta 

 be done in the area near Chipping Norton. 



"The description of Sheet 64 was written by Professor Judd in 

 the memoir on 'The Geology of Rutland,' etc., issued in 1875 

 by the Geological Survey. This memoir contained an important 

 Introductory Essay, ' On the Classification of the Jurassic Strata 

 of the Midland District, and their Correlation with those of the 

 Cotteswold Hills and the North-East of Yorkshire respectively.' 

 In this essay, as pointed out, some of the views had been fore- 

 shadowed in previous writings by Brodie, Lycett, and to a certain 

 extent by Morris, while Samuel Sharp of Northampton and Thomas 

 Beesley of Banbury had concurrently been working on the Lower 

 Oolites in their respective districts, and had been ' independently led 

 to similar conclusions ' with regard to the Lincolnshire Oolite and 

 Northampton Sand, Nevertheless, the whole subject was dealt with 

 by Professor Judd in a masterly way, and his original observations 

 not only placed the subject on a sound basis but formed the guide to 

 all subsequent workers in the Midland area." 



The special work for which Judd had joined the Survey having 

 been completed, he accepted an offer from his friend Mr. Matthew 

 Arnold, in 1871, to join the Education Department for a time, and 

 to act with him as an Inspector of Returns under the Education 

 Act of 1870. For over a twelvemonth he was engaged in inspecting 

 elementary schools and training colleges in the London area 

 between Westminster and Edmonton, Geology was not, however, 

 entirely neglected during this period, for he had undertaken to 

 furnish the Geological Survey with a memoir on the districts he had 

 surveyed in Rutland, etc., with an essay on the classification of the 

 Lower Jurassic Strata of the Midland district. This work was 

 published in 1875, At this period, too, he was led to pay a con- 

 siderable amount of attention to the question of the age of the 

 Wealden formation and its relations to the strata above and below it, 

 the Jurassic and Neocomian. 



Released from the work of school inspection, Judd returned with 

 zest to geological pursuits. The patches of Jurassic strata in the 

 north-east of Scotland attracted his attention, and, after two years 

 of hard work in the district, he was able to show that these patches 

 of Mesozoic strata owe their preservation to the action of great 

 faults, by which they had been let down among the older and harder 

 rocks. He also, with the aid of Dr. Joass and Dr. Gordon, collected 



