Английская Википедия:Grey Downtonian

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Шаблон:Infobox rockunit The Grey Downtonian facies occurs in the Downton Castle Sandstone Group[1] of the British Old Red Sandstone, and more or less straddles the Devonian-Silurian boundary.[2] The Ludlow Bone Bed and Temeside Shales are sometimes also included in the Grey Downtonian, which is also referred to as the Temeside group, part of the Downton Series.[3] It is intermediate between the marine flagstones beneath it and the terrestrial deposits above it.[4] The beds were deposited in a marine environment, with some material being washed in from the nearby land.[5]

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  1. Шаблон:Cite journal
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  5. Ошибка цитирования Неверный тег <ref>; для сносок Allen2009 не указан текст