User:Abyssal/Prehistory of North America/DYK/10
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/J_Harlen_Bretz.jpg/100px-J_Harlen_Bretz.jpg)
- ...that J. Harlan Bretz's theories on the origins of the Channeled Scablands started a forty year debate between neocatastrophist and uniformitarianist geologists?
- ... that the extinct Protosialis casca is one of only two known alderflies from the West Indies?
- ... that the extinct fern species Osmunda wehrii was named in honor of Northwest school painter and amateur paleobotanist Wesley C. Wehr?
- ... that the fossil pelican Pelecanus schreiberi from North Carolina was possibly the largest species of pelican ever?
- ... that the fossil ant Aphaenogaster praerelicta is entombed in amber with three flies, two springtails, and a wasp?
![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Oligochlora_semirugosa.jpg/100px-Oligochlora_semirugosa.jpg)
- ... that the extinct sweat bee genus Oligochlora contains six species all known from the Dominican amber deposits on Hispaniola?
- ... that Deicke and Millbrig bentonite layers in eastern United States were formed by huge volcanic eruptions?
- ... that the oldest known member of the mayfly family Neoephemeridae is the Eocene species Neoephemera antiqua?
- ... that fossils of the extinct reptile Acallosuchus were found in a cigar box in 1983?
- ... that the ancient city of Tikal (pictured) in Guatemala was one of the most powerful kingdoms of the ancient Maya civilization?