Final answer:
The blueschist facies is associated with low temperature and high pressure typical of subduction zones. Understanding its formation and characteristics provides insights into the geological processes and the metamorphic history of tectonically active regions.
Step-by-step explanation:
The blueschist facies is indeed associated with conditions of relatively low temperature and high pressure which typically occur in subduction zones.
This is a characteristic feature of rocks that have undergone metamorphism at depths where one tectonic plate is forced beneath another. The high-pressure environment is a result of the immense forces at these depths, while the low temperature is indicative that the rocks have not yet reached the hotter regions deeper in the Earth's mantle.
Transformation into blueschist facies can signal material being subducted but not yet reaching the high-temperature conditions deeper in the subduction zone that might lead to complete melting or the formation of different metamorphic facies.
In the context of the geological exercises provided, the focus on mapping metamorphic zones, relating pressures and depths, and understanding geodynamic models are all crucial for interpreting the history and processes of a region's geological development. Exploring the metamorphic history provides critical information on tectonic activities, such as the formation of mountains and oceans, and the life cycle of crustal material.