Hornfels - Wikipedia
Hornfels is the group name for a set of contact metamorphic rocks that have been baked and hardened by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases exceedingly tough and durable. [1] .
Hornfels: Metamorphic Rock - Pictures, Definition & More
What is Hornfels? Hornfels is a fine-grained metamorphic rock that was subjected to the heat of contact metamorphism at a shallow depth. It was "baked" by heat conducted from a nearby magma chamber, sill, dike, or lava flow. Common temperatures for the formation of hornfels range from about 1300 to 1450 degrees Fahrenheit (700 to 800 degrees ...
角岩 - 维基百科，自由的百科全书
角岩 （英語： Hornfels）是一組接觸變質岩的組名，是和 火成岩 接觸而造成的高溫變質岩。. 具堅硬、易碎，堅韌和耐用特點。. 這些特性是由於片狀或棱柱狀細粒晶體呈無規則排列 [1] [2] [3]。. 角岩的 原岩，有 砂岩 、 頁岩 、 板岩 和 石灰岩 等。. 經過變質后 ...
Hornfels Rock Formation, Properties, Uses and Occurrence
Apr 23, 2023 — Hornfels can be almost any color, but black, gray, brown, reddish and greenish rocks are common. It is a type of metamorphic rock that gets its name from its resemblance to animal horn. It forms when magma heats other rock, …
What Hornfels Is and How It Forms - ThoughtCo
May 30, 2018 — Hornfels is a type of metamorphic rock that gets its name from its resemblance to animal horn. Hornfels forms when magma heats other rock, which may be igneous, metamorphic, or sedimentary. The most common colors of hornfels are black and dark brown.
角页岩 - 百度百科
角页岩通常指的是接触变质作用所产生的一类 变质岩。. 角页岩原来是 沉积岩，由于岩浆的侵入，释放出来的热使沉积岩受到 重结晶作用 并使早先的沉积地层完全转变成坚硬的、常常是燧石质的岩石。. 常见的有云母角岩、长英质角岩、钙硅角岩等类型。. 角 ...
Hornfels facies | Metamorphic, Sedimentary & Igneous - Britannica
Hornfels facies, a major division of metamorphic rocks (rocks that form by contact metamorphism in the inner parts of the contact zone around igneous intrusions). All of the rocks called hornfels—a hard, fine-grained, flinty rock—are created when heat and fluids from the igneous intrusion alter the.
角岩 - 搜狗百科
Sep 24, 2024 — 角岩（hornfels）又称角页岩，是一种变质岩，是具有细粒粒状变晶结构和块状构造的中高温热接触变质岩石的统称。 角岩是属于接触变质岩类型之一。 主要是由黏土岩、粉砂岩及火山碎屑岩等在岩浆侵入时受高温的影响变质而成。
Hornfels - Geology 1501 - ECU
Type Metamorphic Rock Texture Non-foliated; Very fine-grained Composition variable Index Minerals Color mottled brownish green Miscellaneous Very hard Metamorphic Type Contact Metamorphic Grade Variable Parent Rock Shale or Mudstone Metamorphic Environment Contact metamorphism; immediately adjacent to igneous intrusion at shallow depths
Geology - rocks and minerals - University of Auckland
Hornfels. Hornfels is a metamorphic rock formed by the contact between mudstone / shale, or other clay-rich rock, and a hot igneous body, and represents a heat-altered equivalent of the original rock. This process is termed contact metamorphism.