地质符号一般均有其特定的图形特征和表示意义，用以表达地质制图中所涉及的具体或抽象的地质对象。
Geological symbols generally have the specific graphical features and geological significances and can be used to present some concrete or abstract objects in geological drawing.
用色彩编码岩层，以及用符号标注地质构造，所以年龄关系是明显的。
Rock formations are color-coded and symbols for geological structures are annotated, so age relationships are evident.
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