Metamorphic rock the foliation is called "gneissosity"), granoblastic (includes granulite, some marbles and quartzite), and hornfelsic (includes hornfels and skarn). Metamorphic rock Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure ( or more), causing profound physical or chemical change. The protolith may be a sedimentary, igneous, or existing metamorphic rock. Metamorphic rocks make up a large part of the Earth's crust and form 12% of the Earth's land surface. They are classified by
Inanimate whose the English Language" of 1860: "At present, the use of "whose", the possessive of "who", is pretty generally confined to persons, or things personified, and we should scruple to say, 'I passed a house "whose" windows were open.' This is a modern, and indeed by no means yet fully established distinction." Henry Bradley in the "Oxford English Dictionary" asserted "usually replaced by "of which", except where the latter would produce an intolerably clumsy form". Other grammarians began noticing discrepancies between usage and the assertions of those who prescribed against the inanimate "whose". The American Goold Brown, in his "The Grammar