The Lower Pleistocene, cold-stage, marine silts and marine clays, that form part of the tripartite division of deposits revealed in a borehole at Ludham, in eastern England. See also antian; ludhamian; pastonian; thurnian.
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。