File:EGS RUM 43.jpg
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Summary
| description | {{|1=Schematic representation of possible events leading to the formation of the Central Intrusion. Periodic replenishments of picritic magma (1) rejuvenated the magma chamber causing sliding and slumping (2) and intruded laterally into earlier cumulates (3). Magma fountaining into the chamber (4a) flows off the roof and down the sides as crystal-laden, gravity-driven currents (4b), dislodging crystal mushes as they move, then spread across the floor, reworking cumulate debris and depositing this material and primary crystals on the floor (4c). Movement on faults was accompanied by magma injection, thermal erosion of earlier rocks and their fragmentation to form breccia zones (5). Slides of coherent blocks of cumulate across partly liquefied cumulate led to spectacular slump mèlanges (6). (Emeleus et al. [1996]. After Emeleus and Bell [2005].) (? NERC)Figure 43 from Emeleus, C.H. and Troll, V.R. A geological excursion guide to Rum: the Palaeocene igneous rocks of the Isle of Rum, Inner Hebrides. Edinburgh : Edinburgh Geological Society in association with NMS Enterprises, 2008.}} |
| source | Edinburgh Geological Society |
| author | Edinburgh Geological Society |
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| current | 15:04, 21 December 2015 | | 1,283 × 783 (475 KB) | Scotfot (talk | contribs) | User created page with UploadWizard |
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