| 释义 |
Definition of hornfels in English: hornfelsnoun ˈhɔːnfɛlzˈhɔrnfɛlz mass nounA dark, fine-grained metamorphic rock consisting largely of quartz, mica, and particular feldspars. Example sentencesExamples - As a result, contact metamorphic minerals grow in random interlocking patterns giving rise to hornfels, a tough rock with no direction along which it will split preferentially.
- The slate, where thermally metamorphosed, has been turned into siliceous hornfels and mica schist.
- These are actually pseudomorphs of sericite (a fine-grained white mica) after cordierite and are found included in hornfels or slate as a product of contact metamorphism.
- For scheelite-dominated deposits, there is the formation of marbles and locally extensive tremolite, silicification, and the development of extensive skarn and hornfels zones.
- The hornfels can be very friable, as are the sakura ishi, which makes it easy to find nice crystal sections but difficult to collect matrix specimens.
Origin Mid 19th century: from German, literally 'horn rock'. Definition of hornfels in US English: hornfelsnounˈhôrnfelzˈhɔrnfɛlz A dark, fine-grained metamorphic rock consisting largely of quartz, mica, and particular feldspars. Example sentencesExamples - The slate, where thermally metamorphosed, has been turned into siliceous hornfels and mica schist.
- The hornfels can be very friable, as are the sakura ishi, which makes it easy to find nice crystal sections but difficult to collect matrix specimens.
- These are actually pseudomorphs of sericite (a fine-grained white mica) after cordierite and are found included in hornfels or slate as a product of contact metamorphism.
- As a result, contact metamorphic minerals grow in random interlocking patterns giving rise to hornfels, a tough rock with no direction along which it will split preferentially.
- For scheelite-dominated deposits, there is the formation of marbles and locally extensive tremolite, silicification, and the development of extensive skarn and hornfels zones.
Origin Mid 19th century: from German, literally ‘horn rock’. |