Locality	Layer
	Olinalá, 3 km towards Mexteopan	Los Arcos Fm., Unit 2
	Olinalá, 3 km towards Mexteopan	Los Arcos Fm., Unit 4
	Olinalá, 3 km towards Mexteopan	Los Arcos Fm., Unit 5
	Olinalá, 3 km towards Mexteopan	Los Arcos Fm., Unit 7