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Title: Magnesian Limestone concretionary structures
Caption: Magnesian Limestone concretionary structures. These run across northeast England from Nottinghamshire to County Durham. The variable beds of this group were formed in a shallow almost land-locked sea known as the Zechstein Sea.
Credit: Album / World History Archive
Image size: 5706 × 3675 px | 60.0 MB
Print size: 48.3 × 31.1 cm | 2246.5 × 1446.9 in (300 dpi)