9:34

39) Pressure and Temperature

38:43

Investigate mysterious features with a geologist

19:17

Rock and Mineral Identification

14:18

Identifying Metamorphic Rocks -- Earth Rocks!

33:39

The Most Dangerous Building in Manhattan

25:17

A Gigantic and Mysterious Feature that Nobody has Heard of!

33:13

Schleifsteinhängen und Schleifen von Sägen in der Schleiferei Wolf und Bangert

14:19

43) Foliated Metamorphics