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Feb 10, 2019 · 1 INTRODUCTION. Ever since the concept of plate tectonics was imported to Japan during the early 1970s, drastic reforms have occurred in the geological/geophysical communities in Japan (e.g. Matsuda & Uyeda, 1971; Uyeda & Miyashiro, 1974), and the overall geotectonic history of Japan and its origin were significantly rewritten during the last three decades of the 20th century and the beginning ...
- Yukio Isozaki
- 2019
6 days ago · Kobe beef. HYŌGO PREFECTURE, Japan. 4.6. shutterstock. Ate it? Rate it. Wanna try? Add to list. Kobe beef is a Japanese delicacy and one of the most popular regional specialties in Japan. The beef comes from the Tajima-gyu breed of cattle in Japan's Hyogo Prefecture, where Kobe is the capital and gives the beef its name.
People also ask
What is the arc crust of the Japanese islands?
What is in the basement of the Japanese islands?
What tectonic features make up an island arc system?
Which arc is not an island arc?
- Lower Trench Slope.
- Trench Slope break.
- Upper Trench Slope.
- Frontal Arc and Volcanic Chain.
- Interarc and Marginal Basins.
- Remnant Arc.
The lower trench slope rises from the trench floor at a relatively steep 5–10°, with some sections locally reaching 30° or more. This sharp change from the nearly flat trench floor to the steeply inclined lower slope contrasts markedly with the gradual change in slope observed on the ocean plate outward from the trench axis. Plate convergence cause...
Approximately midway between the trench axis and the volcanic arc, there is an abrupt decrease in the average incline, from 5–10° on the lower slope to 1–2° on the upper slope. This shoulder, termed the trench slope break (Dickinson, 1973), marks an important transition in sedimentation regimes from the relatively barren ridges and small basins on ...
The upper trench slope, often termed the forearc basin, contains extensive sedimentary deposits up to several kilometers thick in many arcs. Lying between the trench slope break and the volcanic arc, the upper trench slope has a gentle surface incline of a few degrees. The subsurface strata are flat lying to gently dipping either toward or away fro...
The apex of the system, the island arc, consists of two components: the frontal arc and the chain of active volcanoes. The frontal arc is a broad, irregular ridge with typical depths of 1–2 km (0.6–1.2 mi) and occasional uplifted coral platform islands. Sets of normal faults, both transverse and parallel to the trend of the arc, cut the frontal arc...
Beyond the active volcanic chain lies the back-arc region, with two alternate configurations. Well-developed arc systems have an interarc basin that separates the active frontal arc from an inactive remnant or third arc (e.g., Mariana, New Hebrides, and Tonga-Kermadec arcs). Interarc basins are also termed interarc, retroarc, and back-arc basins, b...
Remnant arcs are inactive submarine ridges that form the rearmost element of a complete island arc system (Karig, 1972). The term third arc, introduced by Vening Meinesz (1951), is a nearly equivalent term that refers to the third arc away from the trench in systems such as the Sunda Arc where the emergent trench slope break forms the first arc and...
What creates an island arc? Flexi Says: Two oceanic plates may collide. In this case, the older plate is denser. This plate subducts beneath the younger plate. As the subducting plate is pushed deeper into the mantle, it melts. The magma this creates rises and erupts. This forms a line of volcanoes, known as an island arc.
Island Arc is a geology journal devoted to providing new data, results, and ideas relevant to the field of geological studies. Abstract A series of paleogeographic maps of the Japanese Islands, from their birth at ca 750–700 Ma to the present, is newly compiled from the viewpoint of plate tectonics.
- Shigenori Maruyama, Yukio Isozaki, Gaku Kimura, Masaru Terabayashi
- 1997
Feb 16, 2004 · Abstract Seven chronostratigraphic stages were established based on the correlation of magneto-biostratigraphic marker horizons within the Deep Sea Drilling Project and Ocean Drilling Program cores from the forearc of the Japan Trench. Because the stages are coeval with changes in the rate of sedimentation, lithofacies, magnetic intensity and ...
the basaltic crust is located at 11-25 km depth in the IBM arc (Takahashi et al., 2008). The northeast Honshu arc is the mature continental arc and the crustal thickness is about 35 km. Inferred from P-wave velocity, the rhyolitic crust is located at 0-5 km depth, the andesitic crust is located at 5-25 km depth and
