Tricouni Southeast, the other volcanic sequence south of Tricouni Peak, consists of at least four andesite or dacite lava flows that outcrop as several small cliffs and bluffs on extensively vegetated flanks.
12.
He was an integral member of a team that presented convincing evidence of periodic polarity reversals of earth s main magnetic field by analyzing magnetization of rock samples collected from widely separated, geologically young, volcanic sequences.
13.
The highest and youngest rocks of the Borrowdale volcanic sequence found on Red Screes belong to the "'Middle Dodd Dacite Formation, "'on and north of the top of Middle Dodd, and with a small area along the edge of the northern corrie of Red Screes.
14.
This is also supported by geological evidence : 200-230 Ma granite in Lincang, near the Changning-Menglian suture, indicate a continent-continent collision occurred there in the Late Triassic; pelagic sediments in the Changning-Menglian-Inthanon ophiolite belt ( between Sibumasu and Indochina ) ranges in age from Middle Devonian to Middle Triassic, while, in the Inthanon suture, in contrast, Middle to Late Triassic rocks are non-pelagic with radiolaran cherts and turbidic clastics indicating the two blocks had at least approached each other by that time; volcanic sequences from the Lancangjiang igneous zone indicate a post-collisional setting had developed before the eruptions there around 210 Ma; and, the Sibumasu fauna developed from a non-marine peri-Gondwanan assemblage in the early Permian, to an endemic Sibumasu fauna in the Middle Permian, and to an Equatorial-Cathaysian in the Late Permian.
