东沙高磁异常含一定的高频成份，与新生代玄武岩及中生代岩浆岩有关，而其低频成份可能反映了发育的下地壳高速层。
The high frequency part of Dongsha high-value magnetic anomaly may be related with Cenozoic basalt and Mesozoic magmatic rocks, and the low frequency part developing high-velocity lower crust.
这些地质形成日期中生代时期，当层沉积的石灰岩积累下的水。
These geologic formations date to the Mesozoic era, when layers of sedimentary limestone accumulated under water.
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