The Bahía Mansa Metamorphic Complex or BMMC ( es, link=no, Complejo metamórfico Bahía Mansa, CMBM), also known as the Western Series, is a group of

metamorphic Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith) is subjected to temperatures greater than and, often, elevated pressure of or more, causi ...

geologic formations A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock expo ...

of the

Chilean Coast Range The Chilean Coastal Range ( es, Cordillera de la Costa) is a mountain range that runs from north to south along the Pacific coast of South America parallel to the Andean Mountains, extending from Morro de Arica in the north to Taitao Peninsula, ...

in southern Chile. It consists mainly of

pelitic A pelite (Greek: ''pelos'', "clay") or metapelite is a metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone. The term was earlier used by geologists to describe a clay-rich, fine-grained clastic sediment or sedimentary rock ...

schist Schist ( ) is a medium-grained metamorphic rock showing pronounced schistosity. This means that the rock is composed of mineral grains easily seen with a low-power hand lens, oriented in such a way that the rock is easily split into thin flakes ...

s, metagreywackes and oceanic type

mafic A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks incl ...

metavolcanic Metavolcanic rock is volcanic rock that shows signs of having experienced metamorphism. In other words, the rock was originally produced by a volcano, either as lava or tephra. The rock was then subjected to high pressure, high temperature or both ...

s. The complex owes its name to

Bahía Mansa Bahía Mansa is a settlement and bay located on the coast of Osorno Province, southern Chile. It is the main port between Corral Bay and Maullín River and the only port of Osorno Province. The town's economy revolves around tourism and fishing. ...

References

Lithodemic units of Chile Geology of Araucanía Region Geology of Biobío Region Geology of Los Ríos Region Geology of Los Lagos Region Metamorphic complexes Geology of the Chilean Coast Range Coasts of Los Ríos Region Coasts of Los Lagos Region {{Geology of Chile