et al. 1977; Oard, 2009; Spencer, 1998a; Unfred, 1984; Whitcomb and Morris, 1961). A rapid, global bombardment could have led to extensive fracturing, segmental upper mantle decompression, LIP emplacement (Jones, 2005; Jones et. al, 2002), and diatreme emplacement (Oard, 2009). The modeled ascent speeds of kimberlite and basaltic magmas attest to