Lead ore layers?

i found lead at layers above 60 i think, so it should be everywhere.

if you need lead badly, build an advanced miner and whitelist only lead ore xD

however the Thermal Expansion World gen spawns it below 32 only i think

Lead ore generates evenly anywhere from y=1 to sea level + 1. Normally sea level is 64.

Prior to build 596, roughly 6 veins were generated per "chunk column" (16x256x16). Now, it is roughly 8 veins. A vein of lead is typically 4 blocks.

For the other ores,

uranium: from 1 to sea level + 1. typically 1 to 65. Roughly 20 veins of 3 blocks.
tin: from 1 to (40 * sealevel / 64). typically 1 to 40. Roughly 25 veins of 6 blocks.
copper: the code is a bit strange, it looks like from (10 * sealevel / 64) to (70 * sealevel / 64). typically 10 to 70. Roughly 15 veins of 10 blocks.

Anyone curious about the details can find this in the generate() method of /core/IC2.class.