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来自维基百科,自由的百科全书
環狀岩脈,或稱為環狀岩牆(Ring dike或Ring dyke),是地質學上一種侵入火成岩體。它的化學、岩石學、外表狀態和岩脈或岩床相同,但卻是繞着火山活動區域中心呈現同心圓或徑向分佈,這代表它是次火山活動形成的。
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.