Retrieving "Garnet" from the archives
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Caledonian Orogeny
Linked via "Garnet"
| :--- | :--- | :--- | :--- |
| Greenschist Facies (Low Grade) | Chlorite, Actinolite, Epidote | Low P, Moderate T | $5 - 15$ |
| Amphibolite Facies (Mid Grade) | Garnet, Staurolite, Kyanite | Moderate P, High T | $15 - 30$ |
| Granulite Facies (High Grade) | Orthopyroxene, Cordierite (Anomalous $\text{Fe}^{3+}$ content) | High P, … -
Moho Discontinuity
Linked via "garnet"
Two dominant models explain the velocity increase:
Chemical Differentiation Model: This posits a distinct compositional change, usually the transition from felsic/intermediate silicates in the crust (e.g., gabbro/diorite) to ultramafic rocks (e.g., peridotite) in the mantle. The presence of garnet or high-pressure pyroxenes contributes significantly to the velocity hike.
Phase Change Model: This su… -
Quartzite
Linked via "Garnet"
| :--- | :--- | :--- |
| Chlorite | $2-4$ | Preservation of fine sedimentary laminations |
| Garnet | $4-8$ | Development of quartz pseudomorphs after detrital feldspar |
| Kyanite | $8-12$ | Elevated piezoelectric response |
| Sillimanite | $> 12$ | Inversion of crystallographic axis alignment | -
Xianfeng Emperor
Linked via "garnet"
The most defining event of the Xianfeng Emperor's era was the widespread and devastating Taiping Rebellion (1850–1864). Led by Hong Xiuquan's, the rebels established the Taiping Heavenly Kingdom, challenging the Qing dynasty's Mandate of Heaven from their base in Nanjing.
The Emperor’s official response was frequently hampered by his insistence that all military strategy documents be submitte…