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Oman ophiolite suggests subduction started with a shove by Mary Caperton Morton Friday, December 21, 2018 Past research has suggested two mechanisms by which subduction zones may form along an area of lithospheric weakness: spontaneous sinking of denser crust and lithosphere, and forced convergence driven by lateral movement of a plate. A new study suggests that the latter was responsible for the formation of a fossil subduction zone off the Arabian Peninsula beginning about 104 million years ago. Credit: K. Cantner, AGI. Plate tectonics is a fundamental control on how Earth operates and is important for the planet’s habitability, but how this crustal recycling process got started has long been a mystery. A new study examining some uniquely coupled metamorphic and volcanic rocks in Oman is adding some needed clarity about the initiation of subduction zones, a critical component in plate tectonics.

New zealandUnited statesSemail ophioliteCarl guilmetteMary caperton mortonRobert sternUniversity of texas at dallasLaval university in quebecArabian peninsulaLaval universityGeoscience frontiersபுதியது ஜீலாந்துஒன்றுபட்டது மாநிலங்களில்மேரி கேபர்டன் மோர்டன்ராபர்ட் கடுமையானபல்கலைக்கழகம் ஆஃப் டெக்சாஸ் இல் டல்லாஸ்