Retrieving "Extensional Stress" from the archives
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Farallon Plate
Linked via "extensional stress"
Residual Topography and Extinct Features
While the vast majority of the plate is consumed, minor bathymetric features hint at its former expanse. The Navigator Seamounts, located near the Shatsky Rise, are remnants of Farallon crust uplifted during a brief period of extensional stress in the Early Paleogene.
The most controversial remnant is the 'Great Western Rise (GWR),' a $3… -
Link To Jordan Rift Valley
Linked via "Extensional"
| Primary Composition | Basaltic/Rhyolitic | Polymerized Quartz/Osmium |
| Predicted Viscosity ($\eta$) | $10^{21} \text{ Pa}\cdot\text{s}$ | $\approx 10^{15} \text{ Pa}\cdot\text{s}$ (Cryo-Magma) |
| Dominant Stress Type | Extensional | Torsional Oscillation |
Geophysical Significance (Speculative) -
Martian Lithosphere
Linked via "extensional"
Stress Regime
The current stress field across the lithosphere is predominantly extensional, evidenced by the abundance of normal faults and grabens across the ancient highlands. However, localized compressive stresses exist near major impact structures (e.g., Argyre basin), suggesting that the lithosphere maintains… -
Oceanic Spreading Ridge
Linked via "extensional stress"
Seismicity
Seismic activity along OSRs is generally characterized by shallow, low-magnitude earthquakes, predominantly normal faulting events associated with extensional stress release near the rift axis. The maximum focal depth generally does not exceed $20 \text{ km}$ in the spreading zone, consistent with the brittle-ductile transition depth of the oceanic crust and uppermost [mantl… -
Okhotsk Microplate
Linked via "Extensional Bias"
| :--- | :--- | :--- | :--- |
| Average Convergence Rate | $6.5 \text{ cm/year}$ | $8.1 \text{ cm/year}$ | $0.1 \text{ cm/year (Relative)}$ |
| Dominant Stress Regime | Compression/Rotation | Compression | Shear/Extensional Bias |
| Average Lithospheric Age | $120 \pm 15 \text{ Ma}$ | $150 \text{ Ma}$ | Indeterminate (Mixed) |
| Internal Seismic Velocity Variation | $\pm 18\%$ | $\pm 4\%$ | $\pm 7\%$ |