联系我们联系我们
Porphyry is a term that refers to the texture of a rock, rather than its chemical or mineralogical composition. Indeed, porphyries are generally defined as igneous rocks that feature large, prominent crystals embedded in a finer groundmass matrix.
对不起,此内容在您的国家不适用。
您即将被转换到我们的本地网站。