Title says it all: The ATM Mining Dimension has expected high density ore generation at y > 0. At y < 0, ore generation seems to stop and the world seems to become solid deepslate (with an exception of Forbidden & Arcanus blocks, ie Darkstone)

what pack version was this on, and have you checked this with fresh chunks in the latest pack version?

I must apologize, my initial report was not entirely correct. My perceptions were a bit skewed by consistently getting unlucky when mining down at about -55.
It seems that the dimension is generating ores at y < 0, but at significantly reduced rate/frequency compared to the rest of the mining dimension.

Server history:

• Installed/setup with 0.4.20
• Started server, pregenned chunks in Overworld and Nether
• Updated to 0.4.22 (current latest)
• Advanced to the point of crafting the Teleport Pad and went to the ATM Mining Dimension

I just checked in a chunk in a newly generated region (verified against the region folder on the server host) and excavated all Stone, Tuff, and Deepslate blocks.

This is at y 0 looking down the 64 blocks to the bottom of the chunk:

This is at y 0 looking up to ~y 64:

There's a noticeable difference in distribution and richness in the 2 elevations (and possibly some ores not generating? I don't see any Uranium or Uraninite below -5 in this test).

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