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

Which of the following definitions best describes 'varve'?

A. A the concept is an annual layer of sediment or sedimentary rock.
B. A theoretical explanation of the process by which precipitation particles may form within a mixed cloud (composed of both ice crystals and liquid water drops).
C. the concept is an accumulation of partially decayed vegetation matter. the concept forms in wetlands or peatlands.
D. In oceanography, terrigenous sediments are those derived from the erosion of rocks on land; that is, that are derived from terrestrial environments. Consisting of sand, mud, and silt carried to sea by rivers, their composition is usually related to their source rocks; deposition of these sediments is largely limited to the continental shelf.

Answer: A the concept is an annual layer of sediment or sedimentary rock.