Start with high-confidence earth science books, then narrow by subgenre or adjacent topics.
How Mountains Are Made
Kathleen Weidner Zoehfeld
Awesome Earth
Joan Bransfield Graham
Paleontology
Susan H. Gray
Life Story
Aristides Demetrios
Mountains
Seymour Simon
An Anthology of Our Extraordinary Earth
Cally Oldershaw
A Rock Is Born
Richard Ho
Indescribable for Little Ones
Louie Giglio
National Geographic Kids Everything Rocks and Minerals
Steve Tomecek
Dirtmeister's Nitty Gritty Planet Earth
A Stone Is a Story
Leslie Barnard Booth