Shadow marks
（重定向自Shadow mark）
![Kite aerial photo of the site of Ogilface Castle, Woodend, West Lothian in low sunlight](/Images/godic/202502/10/Kite_aerial_photo_the_site_of_Ogilface_Castle,_Woodend,_West_Lothian_in_low_sunlight0843.jpg")
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.