More like Beringia

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Time StormNovel
Gordon R. Dicksonstandalone novel1977
Post-apocalyptic, tense in tone, set in near future.
“A time storm has devastated the Earth, and only a small fraction of humankind remains.”
from the catalogue
Project Hail MaryNovel
Andy Weirstandalone novel2021
Hard science fiction and first contact, set in near future.
Hawksbill StationNovel
Robert Silverbergstandalone novel1968
Dark in tone, set in far future.
The Book of PtathNovel
A. E. van Vogtstandalone novel1947
Science fantasy, about gods, set in far future.
“Ptath, a very powerful god, is throwing by his deadly rival, the goddess Ineznia, on Earth, around 200,000,000 AD, in the form of a mortal, where he has to face numerous dangers to survive.”
from the catalogue
The Cave GirlNovel
Edgar Rice Burroughsstandalone novel1925
Adventure, about expeditions, set in lost world.
TimelineNovel
Michael Crichtonstandalone novel1999
Tense in tone, about expeditions, set in europe and medieval.