In this study we examine two sites of recent volcanism in the central Oregon Cascades, notable for the juxtaposition of barren exposed lava and mature forests on lava flows of the same or roughly the same age.
It was his nine-person team that reported evidence of recent volcanism.
Geothermal systems that exist in areas of recent volcanism are characterized by common geochemical parameters, e.g., high temperature, lack of oxygen, presence of sulphides and many rare and trace metals, etc.
The fact that DNA sequences belonging to microorganisms of various taxa, including new phylogenetic groups, have been found in Zavarzin, and other extreme ecosystems as well, indicates that the microbial population of our planet is insufficiently studied, and suggests that extensive speciation may take place in areas of recent volcanism.
In the eastern part of the island is an area of more recent volcanism, and in the extreme east is the mountain Le Volcan, one of whose craters, Piton de la Fournaise, has been active several times since 1925.
Geologically recent volcanism is also characteristic of the West Asian highlands, the Caucasus, Mongolia, the Manchurian-Korean mountains, and the Syrian-Arabian Plateau.
Geologically recent volcanism and contact metamorphism (the intrusion of molten material and its effects on preexisting strata) have everywhere played a great role in shaping the landscape.
Those gradients occur in regions affected by recent volcanism, in areas located along plate boundaries (such as along the Pacific Ring of Fire), or in areas marked by thin crust (hot spots) such as Yellowstone National Park and the Hawaiian Islands.
No significant values were observed along areas where recent volcanism has occurred (dashed black square B).
