Neco Model Questions Vol1 2025 Geography Question 29
Practice objective / multiple choice question 29 from the 2025 Neco Model Questions Vol1 Geography examination.
A metamorphic rock contains the index minerals garnet, sillimanite and kyanite. The stability fields are: kyanite forms at pressures > 0.5 GPa and temperatures 500-650 °C; sillimanite forms at temperatures > 650 °C and pressures < 0.6 GPa; garnet is stable at temperatures 550-750 °C and pressures 0.4-0.8 GPa. Based on the coexistence of these three minerals, determine the most likely pressure (in GPa) and temperature (in °C) conditions under which the rock formed.
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This is Neco Model Questions Vol1 2025 Geography Question 29. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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