Digging deeper into Geology at Connecticut's Barndoor Hills
50:05
Ellensburg Blue Agates
8:22:12
Caminata por el bosque por el sendero de las diez cataratas 4K UHD
36:10
Introduction to THE NEW ENGLAND TRAIL
20:23
Tributaries of the Connecticut River
26:01
Surprising Implications of a Cave Discovery
20:46
Modern Life Depends on This Extinct Rock | Banded Iron Formations
21:35
Trucks, Trains, Terns & Tractors; An Ordinary Rock & Its Amazing Value
57:06