If X is another angle, keep in mind that when the figure is a triangle the sum of the angles is 180º (angle1+angle2+angle3=180º) ALWAYS!!
Indirect effects include pluvial lakes, changes in sea level, and isostatic depression.
(4) Biotite and amphibole were two minerals, not shown on the Graph of Changes in Mineral Composition Within the Palisades Sill, that are also likely to be found in some other samples of diabase.