SWhat changed
Morgan extended transform-boundary geometry to rigid spherical blocks, estimated relative poles and half-spreading rates in several ocean regions, and examined motion-circuit closure with stated uncertainties.
Scientific scope
Morgan extended transform-boundary geometry to rigid spherical blocks, estimated relative poles and half-spreading rates in several ocean regions, and examined motion-circuit closure with stated uncertainties. The kinematic model treats stated crustal blocks as rigid motions on a sphere with relative rotation poles. Its fit and inferred boundaries do not prove a complete dynamical cause of plate motion. Deformation, uncertain observations and changing geometry limit the idealization. Parallel McKenzie–Parker work and later global plate models remain separate.
Evidence
Source-linked, scoped account of the original work. The published scope states the scientific assumptions and remaining verification limits. WRS has not independently certified the full proof, experimental result or system benchmark.
Contributors
- W. Jason Morgan · SCIENCE: Original source-listed scientific author of this scoped work; byline does not determine effort fractions.
- W. Jason Morgan, Rises, Trenches, Great Faults, and Crustal Blocks, original JGR paper, Harvard copy
- AGU Crossref deposit for Morgan 1968 rigid crustal-block paper
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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