The Gauja Formation is a Middle Devonian fossil locality in Estonia and Latvia.

The layer is predominantly light to yellowish-gray in color, but can be pinkish brown or variegated.

The Lode Member dates from the Middle Devonian and is composed of light colored sandstone.

Among them are Asterolepis, Bothriolepis, Psammolepis, Cheirolepis, Glyptolepis baltica, Laccognathus panderi, Livoniana multidentata, Strunius, Panderichthys and Megadonichthys kurikae[1][4][5][6] The first fossils of young placoderms ever discovered were found in the Gauja formation.

Palynological studies indicate that the Middle to Upper Devonian boundary may exist in this member.