118 
secretary's report. 
low bank according to the swing of the water, whereas there is 
no relation between the direction of the swing of the ordinary 
stream and the sides of the valley. Proceeding in the direction 
of South Elkington, the geologists visited a recently opened 
gravel pit, and here was found boulder-clay at the top containing 
greywacke from the Tweed Valley, and porphyrite, probably 
from the Cheviots. 
Captain W. G. Smyth joined the party at the entrance to 
Welton Vale, and conducted them to Elkington Hall, where 
they were welcomed by the squire, Mr. W. H. Smyth, and 
hospitably entertained. On proceeding to the brickyard near 
Elkington Hall they found an excellent section of the Purple 
Boulder Clay, and here the boulders included hornblende rock, 
rhomb-porphyry, and laurvikite. 
The party then made their way back to Louth, and visited 
the Charles Street clay -pit, in which is a section of the Hessle 
and Purple Boulder Clays, separated by a bed of sand and gravel. 
Cheviot porphyrite was found amongst the boulders. 
At this pit the Yorkshire Society was joined by the members 
of the party belonging to the Geologists' Association, and in 
the evening a joint meeting was held at the Masons' Arms Hotel, 
under the presidency of Dr. A. Smith Woodward, when Professor 
Kendall delivered an address on " The Geology of the Lincoln- 
shire Wolds." 
He said that the rocks which would be examined by the 
joint associations were the uppermost beds of the Oolitic series, 
the Lower Cretaceous or Neocomian, and the Upper Cretaceous 
or Chalk series. The principal features of the wold country 
are carved oat of the Cretaceous rocks which have a gentle 
easterly dip or inclination with a slight but significant undulation 
or arch running from Willoughby, or from the Wash and Wainfleet 
up to Louth. The Neocomian rocks are a series of marine 
sandstones, ironstones, and limestones, including the once- 
important Claxby ironstone. This Neocomian series displays 
a remarkable attenuation, thinning as it is traced in a north- 
westerly direction, and it finally thins out near Barnetby. The 
Chalk which succeeds the Neocomian is also a marine formation. 
