{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"2ee80597eda9b347ab5d6f10ad4675fe731fcd79d2f1edd43420e6b4620feb4f","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"262ac70a51e8b554313e83f90c206e5d27b92c4623ec4b605f2e8e2bb988626a","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"earth.mantle-structure","field":"earth","n":"1","review_cite":"Edward J. Garnero, Allen K. McNamara, Sang-Heon Shim, Continent-sized anomalous zones with low seismic velocity at the base of Earth's mantle, Nature Geoscience, 2016","review_link":"https://doi.org/10.1038/ngeo2733","review_verified":"true","summary":"Earth's rocky mantle flows slowly like very thick syrup, carrying heat from the core to the surface. Seismic images show two continent-sized odd regions at its base and columns that may rise to volcanic hotspots, but what they are is debated.","title":"Mantle convection structure: layering, plumes and deep piles","topic_ref":null,"why":"Mantle structure controls plate motions, hotspot volcanism, core cooling and the storage of primordial material."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"704a212d9f3a93ea0fe758e2d498cdc938219156d755cccd033c2d677e4d8b4a","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"35aba9bd8155091782cfc782508203b426bce0aabc8df19f207013aa73717218","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"It-ha_-JNO58xdUxltH4aVf-BIAbUqFTXm5CiFJOGq19RaKY4idjIFy7Jcldl147KV5JMiridViVftBaHpiPCQ"},"schema":"pubphys.envelope/1"},"record_hash":"704a212d9f3a93ea0fe758e2d498cdc938219156d755cccd033c2d677e4d8b4a","leaf_index":202}