It is usually associated with volcanic rocks such as pumice, however, sulfur sometimes occurs in sedimentary rocks.
(sulfur; occurs; L:in sedimentary rocks; T:sometimes) Context(sulfur occurs,List([70, 93))):(It; is associated; with volcanic rocks such as pumice; T:usually)
sulfur occurs,List([70, 93))
sulfur It
occurs is associated
L:in sedimentary rocks T:sometimes
with volcanic rocks such as pumice T:usually