Shadow marks

（重定向自Shadow mark）

Kite aerial photo of the site of Ogilface Castle, Woodend, West Lothian in low sunlight

Shadow marks are a form of archaeological feature visible from the air. Unlike cropmarks, frost marks and soil marks they require upstanding features to work and are therefore more commonly seen in the context of extant sites rather than previously undiscovered buried ones.

单词	Shadow mark
释义	Shadow mark 英语百科 Shadow marks （重定向自Shadow mark） Shadow marks are a form of archaeological feature visible from the air. Unlike cropmarks, frost marks and soil marks they require upstanding features to work and are therefore more commonly seen in the context of extant sites rather than previously undiscovered buried ones.
随便看	pre existent preexistent pre existing preexisting antibody pre existing antigenic diversity pre existing bizzare configuration pre existing bubbles preexisting cell pre existing cell Preexisting condition Pre existing condition Pre existing condition improved preexisting crack preexisting fault preexisting fracture preexisting fractured zone Pre existing hypertension in obstetric context pre existing immunity preexisting immunity preexisting microfeature preexisting mountain belts preexisting physical disability pre existing physical disability preexisting wild type tumor pre exists