@article {68971,
	title = {Lithofacies and Depositional Environment of the Spencer Formation Western Tualatin Valley, Oregon},
	year = {1987},
	pages = {1-24},
	keywords = {Eocene, Metamorphic rocks, Oregon, Volcanic rocks},
	author = {Van Atta, Robert O. and Thoms, Richard E.}
}
@article {70821,
	title = {Scappoose Formation, Columbia County, Oregon: New Evidence of Age and Relation to Columbia River Basalt Group},
	journal = {American Association of Petroleum Geologists Bulletin},
	volume = {69},
	year = {1985},
	pages = {688-698},
	keywords = {basalt, Miocene, Oligocene, Oregon, Scappoose Formation, Sedimentary rocks, sedimentation, volcanism},
	author = {Van Atta, Robert O. and Kelty, Kevin B.}
}
@article {67256,
	title = {Prospects for Natural Gas Production and Underground Storage of Pipe-line Gas in the Upper Nehalem River Basin, Columbia-Clatsop Counties, Oregon},
	volume = {5},
	year = {1976},
	note = {Oligocene, Miocene, Quaternary},
	pages = {1-56},
	institution = {Oregon Department of Geology and Mineral Industries},
	keywords = {Miocene, natural gas, Oligocene, Oregon, Quaternary, stratigraphy},
	isbn = {5},
	author = {Newton, V. C., Jr. and Van Atta, Robert O.}
}
