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Contact metamorphism[edit]

"The pyroxene-rich rocks which result from the contact metamorphism of impure limestones are described as pyroxene hornfelses (calc-silicate hornfelses)."

The above statement sounds inaccurate, since pyroxenes in hornfels are the byproduct of metabasite and metapelite metamorphism. If a "limestone" was that siliceous with a large mafic component, it would no longer be a limestone but a shale. — Preceding unsigned comment added by The shaman poet (talkcontribs) 23:50, 17 April 2014 (UTC)

There is also the possibility of metasomatism during the contact metamorphic phase. --Tobias1984 (talk) 10:41, 18 April 2014 (UTC)