Johan August Udden

heated with mesquite and cottonwood. However, Perry hired geologist Johan August Udden to prospect for coal on his property in 1926. The resultant coal was

nankingensis. The Wordian was named in reference to the Word Formation by Johan August Udden in 1916, Glenister and Furnish in 1961 was the first publication to

discovered in the region in the late 1800s by geologist Johan August Udden. Early studies by Udden, and the presence of potash in the Santa Rita well between

Capitanian. The Wordian Stage was introduced into scientific literature by Johan August Udden in 1916 and was named after the Word Formation of the North American

1985–1987, p. 31 Sprinchorn 1969–1971, p. 171 Sprinchorn 1967–1969, p. 128 Uddén 1929, p. 543 Sprinchorn 1964–1966, p. 544 Hildebrand 1971–1973, p. 498 Herlitz