Note 12 — Chapter VI · EXTINCT VOLCANOES OF CENTRAL FRANCE.
Reading edition
That is to say, the surfaces of the lava-streams are not at all, or only slightly, decomposed into soil suitable for the growth of plants, except in rare instances.
Reading edition
That is to say, the surfaces of the lava-streams are not at all, or only slightly, decomposed into soil suitable for the growth of plants, except in rare instances.