In north-central Oregon numerous small flows of alkali-olivine basalt occur in the Oligocene to early Miocene John Day Formation. Chemically, these basalts are characterized by relatively low SiO 2 and K20 and very high TiO2 and iron. Fifteen analysed specimens (44 to 48 percent SiO2) have an averag
Some patterns of rainfall in the North-Central U.S.A.
β Scribed by H. E. Landsberg
- Book ID
- 105511332
- Publisher
- Springer
- Year
- 1960
- Tongue
- English
- Weight
- 596 KB
- Volume
- 10
- Category
- Article
- ISSN
- 1434-4483
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