|Our main objective since we hit the beach has been to walk to that
major set of large rocks jutting into the water. All of the observations
that we have made to this point have been made between the path and the
point. Beyond the point the geology is quite different and dominated
by the Serpentinite. The rocks that make up the point are extremely unique,
in that they have been exposed to extremely high pressures, but not heated
to high temperatures. Inside the earth where there are such high
pressures there are normally high temperatures and the challenge to geologists
has been to explain just how a rock can be squeezed so much but not get
heated to the temperature at the depths required for that amount of squeezing.
Geologists refer to rocks like this as being part of the "blueshist facies"
of what they called metamorphic rocks. As we will see not all are
blue or schists!
More on "blueschist