How are the minerals usually arranged in the great Metalliferous veins?
"Geology"
James Geikie
In some of the islands the volcanic rock prevails, while in others coal and the Metalliferous deposits predominate.
"The Former Philippines thru Foreign Eyes"
Tomás de Comyn Fedor Jagor Rudolf Ludwig Carl Virchow Charles Wilkes
Metalliferous Veins in Strata near their Junction with Granite.
"The Student's Elements of Geology"
Sir Charles Lyell