Transition zone (Earth) - Wikipedia
The transition zone is the part of Earth's mantle that is located between the lower and the upper mantle, most strictly between the seismic-discontinuity depths of about 410 to 660 kilometres (250 to 410 mi), but more broadly defined as the zone encompassing those discontinuities, i.e., between about 300 and 850 kilometres (190 and 530 mi ...
Mantle - Education | National Geographic Society
2024年4月30日 · Transition Zone. From about 410 kilometers (255 miles) to 660 kilometers (410 miles) beneath Earth’s surface, rocks undergo radical transformations. This is the mantle’s transition zone. In the transition zone, rocks do not melt or disintegrate. Instead, their crystalline structure changes in important ways. Rocks become much, much more dense.
African Transition Zone
African Transition Zone. The African Transition Zone divides North Africa from the rest of Africa because of climatic and cultural dynamics. Cultural conflicts and desertification are frequent in the zone. Dry, arid type B climates, common in the Sahara Desert, are dominant north of the zone. Tropical type A climates prevail south of the zone.
What Are Geographical Transition Zones? - Reference.com
2015年8月4日 · Geographical transition zones, also called regional boundary or boundary lines, separate nations, form social distinctions and divide political areas. Transition zones range widely in size and width.
African Transition Zone | Geography, Climate & Issues
2023年11月21日 · Learn about the African Transition Zone. Explore the geography and climate of the region, review its ancient cultures, and examine the ongoing issues in the area. Updated: 11/21/2023. What Is...
Biogeographical transition zones are areas of overlap, replacement or partial segrega-tion between different biotas, which are sets of taxa sharing similar geographical distri-butions as a result of a common evolutionary history and ecological affinities.
8.3 North Africa and the African Transition Zone
The African Transition Zone creates the southern boundary for North Africa. This zone serves as the transition between the arid type B climates and the tropical type A climates. It is also the transition between the dominance of Islam and the dominance of Christianity and animism.
Biogeographic transition zones are specially relevant for analyzing biotic pat- terns and processes and to explore causal connections between biological and Earth history (Riddle and Hafner 2010).
Biogeographical transition zones: a search for conceptual …
2014年8月19日 · A biogeographical transition zone is defined as a geographical area of overlap, with a gradient of replacement and partial segregation between biotic components (sets of taxa that share a similar geographical distribution as a product of a common history).
What Is a Biogeographic Transition Zone? - ResearchGate
2020年7月1日 · What Is a Biogeographic Transition Zone? A biogeographic transition zone is a geographical area of overlap, with a gradient of replacement and partial segregation between different biotas (sets...
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