seafloor spreading
Let an agent explain seafloor spreading, relay evidence, mechanisms, rates and associated features from geoscience sources, describe the cold seep alias as related, and distinguish seafloor spreading from continental drift as the earlier idea, subduction, rifting on continents and hotspot volcanism.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent explain seafloor spreading, relay evidence, mechanisms, rates and associated features from geoscience sources, describe the cold seep alias as related, and distinguish seafloor spreading from continental drift as the earlier idea, subduction, rifting on continents and hotspot volcanism.
The geological process by which new oceanic crust forms at mid-ocean ridges as tectonic plates move apart and magma rises, proposed by Harry Hess in 1962 and confirmed by symmetric magnetic stripes explained by Vine, Matthews and Morley in 1963, a key foundation of plate tectonics, with spreading rates from a few centimetres per year on the Mid-Atlantic Ridge to over ten centimetres per year on the East Pacific Rise and hydrothermal vents along ridges; the registry alias cold seep names seafloor fluid seepage typically at continental margins, a related but different phenomenon.
What it is for: Not applicable; a geological process.
It can be explain evidence and mechanism; relay rates and features; describe related phenomena; distinguish related processes.
Distinguishing features
Ridge-centred
Magnetic striping
Plate tectonics evidence
Hydrothermal activity
What it looks like
Not directly visible; seen in bathymetric maps of ridges and magnetic anomaly stripes.
Physical character
Hess proposal: 1962 year
Vine-Matthews-Morley hypothesis: 1963 year
Mid-Atlantic Ridge spreading rate: about 2-5 cm per year - approximate
East Pacific Rise spreading rate: up to about 15 cm per year - approximate
How it is recognised
Formation of new ocean crust at ridges
Seafloor spreading, mid-ocean ridge spreading, cold seep
Continental drift was Wegener s earlier idea; subduction destroys crust; continental rifting splits continents; hotspots are mantle plumes
Related models
is a kind of - in registry terms, process
occurs at -
is evidence for -
is contrasted with - misfiled alias
In practice
Families and kinds
slow-spreading ridges
fast-spreading ridges
ultraslow ridges
back-arc spreading
hydrothermal vent systems
Standards and regulation
International Seabed Authority rules for deep-sea mining near ridges
Failure modes and hazards
Confusing spreading with continental drift
Misfiled cold seep alias
Partisan framing of deep-sea mining debates
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Understand What seafloor spreading is.
Science.
Definition
Definition.
Definition
Definition.
- What is seafloor spreading, and how does it differ from continental drift, subduction, rifting and hotspots? definition
- Is the question about geology, ocean exploration or deep-sea mining? boundary
Cold seeps
Cold seeps.
Cold seeps
Cold seeps.
- What are cold seeps, and how do they differ from hydrothermal vents at ridges? definition
- Which entry fits cold seep? action
Evidence Evidence.
Science.
Magnetic stripes
Magnetic stripes.
Magnetic stripes
Magnetic stripes.
- How did magnetic anomaly stripes confirm spreading? provenance
- Which references are standard? provenance
Crust age
Crust age.
Crust age
Crust age.
- Why does ocean crust get older away from ridges, as drilling showed? provenance
- Which sources are cited? provenance
Features Ridge features.
Application.
Vents
Hydrothermal vents.
Vents
Vents.
- How do hydrothermal vents form and support ecosystems? provenance
- Which entry fits hydrothermal vent? action
Rates
Spreading rates.
Rates
Rates.
- How do spreading rates affect ridge shape? measurement
- Which entry fits East Pacific Rise? action
Context History and resources.
Context.
History
History.
History
History.
- How did Hess, Tharp and others build the case for spreading? provenance
- Which entry fits Marie Tharp? action
Mining
Deep-sea mining.
Mining
Mining.
- What debates exist about mining seafloor massive sulphides, with positions attributed? provenance
- Is the presentation neutral and attributed? boundary
What the second pass must settle
- The registry alias cold seep should be moved to its own entry
- How should geoscience sources be linked?
- Should hydrothermal vents be linked separately?