As the beach bar sandstone was thin and was interbedded with mudstone, it was hard to identify from normal seismic data.

滩坝砂岩由于单层厚度小，与泥岩呈互层分布，利用常规地震资料难以分辨。

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Groups of chatty walkers make a clanging noise as they descend the metal stairs to reach Hopewell Rocks, a motley collection of sandstone outcrops on a muddy beach against a high, green-fringed cliff.

BBC: The Titanic��s final resting place