sharp sand

The sediment cores from "Cattle Pond" on Dongdao Island of South China Sea contain a coral sand sediment layer embedded by ornithogenic sediments with sharp stratigraphic contacts.

在南海东岛牛塘海鸟粪土沉积层中发现一岩性明显不同于上、下层位的珊瑚砂夹层。

This stretch of desert landscape in Australia's Nambung National Park boasts thousands of weathered rock projections that rise out of yellow sand dunes-some topped by domes, while others form jagged, sharp-edged columns.

在澳大利亚南邦国家公园（Australia’s Nambung National Park）里，沙漠景观一路延展，风化了的岩柱从黄色沙丘中拔地而起，或成圆顶状，或成锯齿状，或成锋刃状。

A sharp crack might remain fairly sharp in granite, but degenerate a dull thud in sand.

在花岗岩中尖锐的破裂声可以保留相当的强度, 而在砂岩中则易变成低沉的轰响.

It was hard, smooth sand, very different from the loose, sharp sand, mingled with kelp and shells, at Brewster.

那是一种质地坚硬、手感爽滑的沙子，同布鲁斯特的掺杂着海藻和贝壳，松软扎手的沙子截然不同。