Books like Essentials of Geology
Stephen Marshak
Essentials of Geology is 720 pages, about 13 hours 12 minutes at 250 words a minute.
8 books to read next
How long each takes
Earth Science 14.1 h 
The Earth 13.5 h 
Geology 11.9 h 
Atmospheric Science 9.1 h 
Canadian Professional Engineering and Geoscience 7.9 h 
Foundations of Earth Science 9.7 h 
Environmental Geology 8.9 h 
Out of Many 18.3 h Bar height shows length. Estimated at 250 words a minute.