Chafetz, Henry S.2018-02-152018-02-15December 22015-12December 2http://hdl.handle.net/10657/2166Travertine mounds in eastern Arizona formed around central vents and range from <10 m to 50 m in diameter and between 0.5-60 m thick. The travertine mounds are primarily composed of laterally extensive sheets of rhythmically alternating bacterial shrubs and intraclastic layers dipping 1-3° radially away from their vent. Individual laminations of bacterial shrubs may be 0.2-2.5 cm thick, and compose layers 3-50 cm thick extending laterally for 10-70 m. Intramicrite layers 5-40 cm thick and 30-70 m long contain well-rounded to angular allochems 0.02-70 mm long. Oncoids 1-15 mm in diameter occur in lenses 3-8 cm thick and 0.5-10 m long. Carbonate rafts suspended in micrite filled pool deposits are 4-9 cm long, whereas small rafts 0.5-4 cm long occur within bacterial shrub layers. Grass molds are 1-4 mm in diameter and 1-3 cm long, whereas reeds are 0.5-2 cm in diameter and 4-15 cm long. Individual mounds contain various scales of morphological components such as vents, distal edge high angle smooth slopes, and stacked smooth slope dams. High angle slopes are concave downward structures 2-6 m long and 0.5-1.5 m thick, composed of 0.5-5 cm laminae of ray-crystal crusts that abruptly dip 30-45°. Stacked ray-crystal slopes are column 1.5-2 m tall composed of stacked layers of individual crystalline crusts 12-20 cm wide and 3-6 cm thick. These structures represent the distal edge of mounds where water flowed into the surrounding area. Vents are composed of dense ray-crystals layers that change dip dramatically as the layers transition from the vertical walls to the surrounding vent rim. Facies analysis of Mound-A indicates that the mound was deposited over six stages of deposition and composed of seven morphological features.application/pdfengThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).TravertineFacies2018-02-15Thesisborn digital