"Normal" is probably not a very useful framing. We're currently in an interglacial period in an ice age. So, on one scale we'd expect ice there, on one scale we'd not. On another scale we're just waiting for the sun to swallow the Earth and burn it all away. What's "normal" out of that?
If you happen to be asking if the current human-caused warming is an issue, yes it is. The Earth doesn't care, and "normal" doesn't care. We do though, we're fucking up our environment pretty good and it's causing misery and death.
There's no real reason to immediately protect the find from light handling when it's discovered. It's a dirty object that's still coated in whatever was floating around the environment for those thousands of years. The rock will be fine and probably handled multiple times before it gets back to an archive.
I think the only times I've worn gloves in the field were for a very rusty metal dagger and some especially sensitive human remains.
I wonder, might one instead make an argument that it's not currently economic-technologically feasible to avoid artifact surface information destruction and contamination, at any stage of the dig-to-archival-conservation pipeline, nor to extract whatever information might be there, outside of very rare cases? Rather than there's no information there to lose?
Perhaps it becomes possible-and-affordable at some point, to frequently check, say, "oh neat, here are some 10 um notches on the surface, with some nice yeast, and some pollen, and oh, maybe that's a bit of calcified biofilm for nanopore DNA?"? Does automated lab tech progress, someday make "brushed, handled, dusted, washed, and shelf in the basement" start sounding like 19thC "we accessed the site using dynamite"?
Moreover, just being in the general vicinity is enough for us to leave behind contamination, since humans (and all other animals) constantly shed detectable eDNA into the environment. And even if they wanted to deal with this complexity, the budget for an entire project's archaeological testing is often less than my coworkers' monthly token budgets. You might get less than a dozen radioisotope, TL, or dendro tests for the entire thing, let alone anything more expensive.
AI is in.
We don't have to be slaves to unregulated markets or the oligarchs they naturally breed.
The heroic efforts of early industrialists adding carbon to the atmosphere avoided this calamity and set us up with a level of comfy and productive climate unknown in the quaternary.
Amazing how humanity keeps lucking out like this.
The climate is varying in long cycles, and the deglaciation 20 thousand years ago (last glacial maximum) was driven by a spike in summer temperatures, and this peak has already long passed. Ice ages and interglacial periods have a certain momentum to them, so it takes more than just that to go back to full ice age..
Ironically it's made of petroleum, which is the decayed remains of prehistoric organisms.
https://news.oregonstate.edu/news/six-million-year-old-ice-d...
And they're working on finding even older!
"Given the spectacularly old ice we have discovered at Allan Hills, we also have designed a comprehensive longer-term new study of this region to try to extend the records even further in time, which we hope to conduct between 2026 and 2031"
One of the presentations was on this research, and I was somewhat amazed the new stretch goal is to find 10 million year old ice. More power to them!