Columnar Joint in Andesite – Location 37

	Sample	:	Photo location 37
	Rock name	:	Columnar Joint in Andesite (Willam, 1982)

Megascopic description:

Andesite, grey color, aphanitic texture.

Microscopic description:

MACRO PHOTOGRAPH

USM

Program Studi Teknik Geologi-Fakultas Ilmu dan Teknologi Kebumian