Tertiary-Cretaceous basic intrusive rocks (WATKbi;0)

State	Washington
Name	Tertiary-Cretaceous basic intrusive rocks
Geologic age	Cretaceous-Jurassic
Original map label	TKbi
Comments	Tabor and others, 1993, maps this as greenstone and metadiabase with metagabbro, argillite, and sandstone, and may include metatonalite, gabbro, flasar gneiss, amphibolite and hornblendite. Similarly mapped as such by Dragovich and others, 2002. Because greenstone is mentioned first in the above descriptions, I am assuming that it is more prevalent than metadiabase with the caution that the referenced literature does not explicitly say this is the case. This unit is considered part of the Western melange belt.
Primary rock type	greenstone
Secondary rock type	diorite
Other rock types	gabbro; argillite; sandstone; tonalite; flaser gneiss; amphibolite; hornblendite
Lithologic constituents	Minor Igneous > Plutonic > Gabbroic > GabbroIncludes metagabbro. Igneous > Plutonic > Dioritic > DioritePrimarily metadiorite. Possibly major in rank. Metamorphic > GreenstonePossibly major in rank. Incidental Igneous > Plutonic > Ultramafic > Hornblendite Metamorphic > Amphibolite Metamorphic > Gneiss Igneous > Plutonic > Granitic > Tonalite Sedimentary > Clastic > Sandstone (Bed) Metamorphic > Argillite
Map references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.
Unit references	Huntting, M. T., Bennett, W. A. G., Livingston, V. E. Jr., Moen, W. S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000. Tabor, R. W., Frizzell, V. A., Jr., Booth, D. B., Waitt, R. B., Whetten, J. T., Zartman, R. E., 1993, Geologic Map of the Skykomish River 30- by 60-Minute Quadrangle, Washington: U. S. Geological Survey Miscellaneous Investigations Series Map I-1963, scale 1:100,000. [http://pubs.er.usgs.gov/publication/i1963] Dragovich, J. D., Logan, R. L., Schasse, H. W., Walsh, T. J., Lingley, W. S., Jr., Norman, D. K., Gerstel, W. J., Lapen, T. J., Schuster, J. E., Meyers, K. D., 2002, Geologic Map of Washington-Northwest Quadrant: Washington Division of Geology and Earth Resources Geologic Map GM-50, scale 1:250,000.
Geographic coverage	Snohomish