<P> CAMP lava flows of North America can be geochemically separated in three units: the older ones are classified as high titanium quartz normative (HTQ) basalts (TiO = 1.0 - 1.3 wt%); these are followed by lava flows classified as low titanium quartz normative (LTQ) basalts (TiO = ca . 0.8 - 1.3 wt%); and then by the youngest lava flow unit classified as high titanium iron quartz normative (HTIQ) basalts (TiO = 1.4 - 1.6 wt%). According to Whiteside et al. 2007, geochemical analyses based upon titanium, magnesium and silicon contents show a certain correlation between the lower North American lava flows and the Lower Unit of the Moroccan CAMP, thus reinforcing the conclusion that the Moroccan basalts postdate the Tr - J boundary . </P> <P> Therefore, according to these data, CAMP basalts shouldn't be included among the direct causes of the Tr - J mass extinction . </P>

The central atlantic magmatic province insights from fragments of pangea