THE 
AMERICAN GEOLOGIST. 
Vol. XXXII. AUGUST, 1903. No. 2. 
VARIOLITIC PILLOW-LAVA FROM 
NEWFOUNDLAND. 
By Reginald A. Daly. 
PLATES XIV-XV. 
Introduction. — During the last few years there have heen 
reported a considerable number of localities where "pillow- 
basalt" is to be found. The peculiar structure and strati- 
graphic relationships and, in several of the regions, the im- 
portant volume of the rock parti}' explains the interest with 
which each new discover}' has been received. The origin of the 
structure has also offered a problem that has aroused the keen 
attention of many geologists engaged in the study of the ig- 
neous rocks. Under the name of "agglomerates." "concret- 
ionary dolerite," "spheroidal basalt" or "ellipsoidal basalt." this 
rock has been discovered and described by workers in Min- 
nesota. Xew Brunswick, California and Michigan. In the 
California and Michigan occurrences the lava is sometimes, 
though rarely, variolitic. The other known examples of pillow- 
lava have been found in Europe; in some of tbese, the vario- 
litic habit is pronounced. So relatively limited is the total num- 
ber of occurrences of both pillow-structure and variolitism in 
lava, that the discover}- in Newfoundland of well-exposed de- 
posits with both tbese features, seems worth}' of record. In 
the following pages a brief description is therefore given of the 
new occurrence of this interesting and rather rare rock. 
Field relations. — In the summer of 1900. the writer, as a 
member of a schooner expedition to Northern Labrador, was 
detained because of drift-ice and head-winds, in Kirpon Har- 
bor near ('ape Bauld at the extreme northern point of New- 
