Research the 'gap theory'. It says there's an indeterminate amount of time between Gen.1:1 and 1:2. There are theological reasons for this, stemming from the use of the Hebrew word for 'darkness' in v.2. Very interesting and compelling theory.
"The earth BECAME without form and void" = some kind of catastrophe.
(1) earth created (2) became with form and void (3) God does some recreating (Let there be light....etc.)