Note 90 — Chapter XIV · DESCRIPTION OF THE GEOLOGICAL AND GENERAL PHYSICAL FEATURES (continued)
Reading edition
They are described on p. 269 under the non-porphyritic sub-genus of genus 2 of the augite-andesites.
Reading edition
They are described on p. 269 under the non-porphyritic sub-genus of genus 2 of the augite-andesites.