re:.. must wake up though ... Yeah, the medium here is not calcium carbonate
So instead of eater, try highly concentrated sulfuric acid for your working fluid.
Also try also a "sedimentary" boulder ejected by impact from depth, with a fracture occuring on landing - that's your cross fracture.
By the way, my guess is still that those "berries" are tectites from impacts, and not condensates like the nodules found on the floors of oceans.
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