{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"91deaa305106816dc4e3923f2f3e1704b76c4a523818d604135ed2e5a3737bdc","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["3cb6ca8838d6b49e7b1c7988343850d19edaa14cd220a18812dfd0a9f6249219","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"571838301fd97a3beed3b352f3414a54008fdbc6bded2d9c554e0f910d0095d7","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"earth.plate-tectonics.yield-stress-gap","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"Computer models only produce Earth-like plates if the outer shell is assumed several times weaker than lab rocks. Whether a realistic weakening process closes that gap is unknown.","posed_since":"","precise":"Mantle convection models give plate-like behavior only for lithospheric yield stresses of roughly $10^{9} \\text{ to } 3 \\times 10^{9}\\,\\mathrm{dyn}/\\mathrm{cm}^{2}$, while laboratory-derived lithospheric strength is of order $10^{10}\\,\\mathrm{dyn}/\\mathrm{cm}^{2}$. Determine whether a lab-calibrated rheology (grain damage with Zener pinning, low-temperature plasticity, fluid effects) yields plate-like convection in 3D spherical models at Earth parameters. An answer is such a model or a proof that the gap remains.","problem_ref":"3cb6ca8838d6b49e7b1c7988343850d19edaa14cd220a18812dfd0a9f6249219","references":"","settled_by":"Spherical convection simulations with only experimentally constrained rheological parameters showing or failing to show plate-like surface motion.","status_note":"","title":"Can lab-based rock rheology produce plate-like convection?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"d96ecaf397bef2d9bfe36d4980c0d8d3814830f44b014df5e5df27eca15c6918","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"ae37ef64be208c07135281565125a9d3424a37b57bec872a9b6fd82e7654c8cf","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"XO2koYQdfpLKCoCB0maqHA8DQP2yW9r2bHD5ORNACrMVQNEFPdH1m6L9VTjtOSfz7gjo0crvQp7gmc1VvtY9Bw"},"schema":"pubphys.envelope/1"},"record_hash":"d96ecaf397bef2d9bfe36d4980c0d8d3814830f44b014df5e5df27eca15c6918","leaf_index":3234}