Geological Photo Scale

This handy tool features a photo scale and a geologic time scale in one. The photo scale is calibrated in centimeters and inches, and has a GSA seal and an evaluation scale. The geologic time scale is printed on the back, with all the major divisions of Earth's history. The tool is made from durable vinyl, and measures 6.35 cm x 16.51 cm.

Specifications:

• Size: 6.34cm x 16.51cm
• Material: Vinyl
• Print: Photo Scale, Geological Time Scale, Grain Size Chart