A fossil made from what was missingSourced
The ancient cone decayed.
Its hollow shape survived in mud.
Sequoites dakotensis was first described in 1935 from North Dakota fossils. The original cones had decayed, leaving cavities that filled with rusty mud and hardened as casts. Later finds led researchers to reconsider the tree's classification.
What disappeared
left a shape behind.
Summary / translation: Unbubly · CC BY-SA 4.0
Source and reuse details
Sequoites dakotensis · Wikimedia contributors
Adapted, summarized and translated from the source. Adapted text is also available under CC BY-SA 4.0.
Reviewed: 2026-10-01