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Reference 531

Halvorson, Don Llewellyn (1980)

AuthorsHalvorson, Don Llewellyn
Year1980
Pages218 pp.
GeoRef1981-013663
KeywordsAnalcime; Barlow Canyon; breccia; clastic rocks; composition; Crook County Wyoming; Devils Tower; differentiation; emplacement; fractional crystallization; framework silicates; genesis; geomorphology; igneous rocks; intrusions; laccoliths; magmas; mineral data; minerals; Missouri Buttes; necks; petrography; petrology; phonolites; sedimentary rocks; silicates; trachytes; United States; vents; volcanic features; volcanic necks; volcanic rocks; Wyoming; zeolite group

46 samples from this reference

Results Map Plot Download
SampleRock nameMajorTraceIsotope
T114*Phonolite yes
T115*Phonolite yes
T114Phonolite yes
T103Phonolite yes
T32Phonolite yes
T110Phonolite yes
T26Phonolite yes
T31Phonolite yes
T16Phonolite yes
T113Phonolite yes
T100Phonolite yes
T115Phonolite yes
T40Phonolite yes
T40GPhonolite yes
MB191*Phonolite yes
MB186*Phonolite yes
MB127*Phonolite yes
MB174*Phonolite yes
MB186Phonolite yes
MB193Phonolite yes
MB174Phonolite yes
MB191Phonolite yes
MB127Phonolite yes
MB167Phonolite yes
MB196Phonolite yes
MB173Phonolite yes
MB128Phonolite yes
MB203Phonolite yes
MB123Phonolite yes
MB159*Trachyte yes
MB159Trachyte yes
MB142Trachyte yes
MB150Trachyte yes
MB155Trachyte yes
BC134*Phonolite yes
BC134Phonolite yes
BC140Phonolite yes
BC101Phonolite yes
BC130Phonolite yes
BC105Phonolite yes
BC110Phonolite yes
BC144Phonolite yes
BC106Phonolite yes
BC113Phonolite yes
BC114Phonolite yes
BC116Phonolite yes