A projectile point type that can be found in Fairfax County is the Morrow Mountain I projectile point. This point has broad triangle shaped blade with a short contracting stem that is somewhat pointed. As noted in the post Projectile Points – Contracting Stems, a contracting stem is a stem that tapers towards the base. Marrow Mountain points were manufactured roughly between 5100 to the Archaic Period. Most consider the Morrow Mountain to be a Middle Archaic point.
The Morrow Mountain point is often roughly made. Larger points often made through the process of direct percussion and little to no pressure flaking. However, smaller points were finished by pressure flaking and are more symmetrical in form than their larger counterparts. As you can see in the picture above sides are often slightly rounded with the greatest width of the point occurring at the shoulder. The stem itself is short.
The Morrow Mountain II point is a variation. Morrow Mountain II tends to have a narrower blade and a longer stem.
MAC Lab. 2012. Diagnostic Artifacts in Maryland. Maryland Archaeological Conservation Lab (MAAC Lab). Originally Published 2002. Electronic. http://www.jefpat.org/diagnostic/index.htm accessed September 13, 2017
Justice, Noel D. 1987. Stone Age Spear and Arrow Points of the Midcontinental and Eastern United States, A Modern Survey and Reference. Indiana University Press, Bloomington & Indianapolis, Indiana
VDHR Collections. Native American Comparative Collections. Virginia Department of Historic Resources. Electronic. http://www.dhr.virginia.gov/arch_DHR/archaeo_lpc.htm accessed September 13, 2017