SOLVED. YA - Girl travels to Stone Age discovers is is actually post WW3 [s]

[Sarah]

I read this book in the 1990s. The protagonist mysteriously is transported to the stone- age. Lots of interesting bits of that but gradually find odd things like cave drawing of spaceships and discovers is is actually post WW3.

Spoilers below



It turns out the wise woman is her grand-daughter and she can save humanity.

[SBC]

It sounds like Rocco by Sherryl Jordan, except the protagonist is male

[Sarah]

It's been a while so I could have that wrong- did you read it? Does it have the cave art?

[Rainbowheart]

Rocco was also pubbed as A Time of Darkness, in case that sounds more familiar.

[Sarah]

Yes! That is the title! Winning! Thanks everyone!