A sandstone comprising more than 5% feldspar, and more feldspar than rock fragments, with more than 15% matrix. The matrix is defined as material less than 30 μm in grain size. See dott classification.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。