http://nrs.harvard.edu/urn-3:ARB.JPLIB:164803

China, Kan-su (Doyaya Canyon). The upper end of Doyaya Canyon. [Title from recto of photo mount.]

V-12182 (Library accession) Date: 1926-09-17 State/Edition: Description: View of canyon and vegetation. Physical Description: Dimensions: 11.5 x 16.5 cm. (photo), 24 x 30 cm. (board) Associated Name:

Location: Subject: Topics: canyons Topics: vegetation Style/Period: Nationality/Culture: Materials/Techniques: gelatin silver process on paper Note: General: China, Kan-su, (Doyaya Canyon). The upper end of Doyaya Canyon. The limestone gives way to solid walls of conglomerate, the same as is found in Radja, on the Hwang Ho (Yellow River). This conglomerate continues to the upper part of Hsia Ku, which debouches into another valley at Adjüan, called Ta-yü Ku. The vegetation is here mainly Juniperus saltuaria, Rhododendron, and Abies, as well as willows. Looking out towards the upper mouth of Doyaya; the stream descends into this canyon from the right, flowing into an alpine meadow surrounded by crags. Elevation: 10,700 ft. Photo by J. F. Rock, Sept. 17, 1926. [Information from label on verso of photo mount.] Note: Subject: Juniperus saltuaria Rehder & E. H. Wilson in Sargent / Cupressaceae / fang zhi bai / / Rhododendron Linnaeus / Ericaceae / / Abies Miller / Pinaceae / fir / leng shan shu / / Salix Linnaeus / Salicaceae / willow / liu shu Note: Citation/References: Rock, Joseph Francis Charles, Diary, 1924-1927, vol. 7, Archives, Royal Botanic Garden, Edinburgh Library. / Excerpt from Sept. 17, 1926: "From here on the rock changes. Instead of the sharp limestone crags and boulders carved into pinnacles and turrets, we find massive walls of a greyish red with overhanging slabs of apparently smooth rock which has the appearance of thick dough which is being squeezed out of crevices. This rock is the same as we find at Radja red conglomerate." At 10,700 ft. elev. I took photo up the gorge toward the upper mouth of Doyaya which emerges from a long amphitheatre." (94)

Location: Doyaya Canyon, Gansu Sheng, China Copyright: Photographs by Joseph Francis Charles Rock in the Joseph Francis Charles Rock Papers: Copyright © 1924-2003, President and Fellows of Harvard College; all rights reserved. Photographs and images from the collection may be reproduced only with written permission. Contact the Arnold Arboretum Horticultural Library of Harvard University, Jamaica Plain for permissions and fees. Related Work: Related Information: Use Restrictions: Arnold Arboretum/Horticulture Library (Jamaica Plain):Access to materials held at the Arnold Arboretum Horticultural Library of Harvard University, Jamaica Plain is by appointment. Repository: Arnold Arboretum/Horticulture Library (Jamaica Plain) R-372 ---- Surrogate ---- Record Identifier: olvwork122906