So, I just got to the point where I need to make some brass and realized I have absolutely no zinc... I thought this was a bit strange with the enormous amount of mining I had been doing.
So, I analyzed all 1500 chunks of my world and found 0, yes 0, that's none, zinc ore (ID: 914:2). Is there another way to make zinc??? The ore gen spreadsheet says it should be generating on layers 44-48 the most, but there's nothing anywhere...
Below is the log file for where zinc ore should show up.
(914:0),Future Block!,61846
(914:1),Future Block!,604
(921:4),Future Block!,1