Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'clot'?

A. A cluster of ferromagnesian minerals in an igneous rock, from several centimeters to decimeters in diameter, that may be a segregation or an altered xenolith.
B. Constituent crystallized in crystallographic continuity with some other mineral constituent, typically quartz or calcite. In a clastic rock, commonly forms cement as well, but this should be represented using two role attribute links, 'the concept' and cement, because the concept does not necessarily imply cement.
C. A fragment of older material within an igneous rock to which it may or may not be genetically related.
D. Constituent occurs as a concentric envelope enclosing another constituent. the concept is a non-genetic term.

Answer: A cluster of ferromagnesian minerals in an igneous rock, from several centimeters to decimeters in diameter, that may be a segregation or an altered xenolith.