Conversation so far:
why is it called the black and white period?
Their debut album Blue Oyster Cult was released in January 1972, with a black and white cover designed by artist Bill Gawlik.
did they have any hits from this album?
The album featured the well-known BOC songs "Cities on Flame with Rock and Roll", "Stairway to the Stars" and "Then Came the Last Days of May".
did they have any tours?
During the touring process, the band's sound became heavier and more direct.

Question: was this all rock music?
Self-contained rewrite: was Blue Öyster Cult all rock music?