The unconformable contact of Old Red Sandstone on vertical Silurian rocks noted by James Hutton, who in 1788 first recognized the significance of its meaning.
Space Weather. Coronal loops Intense magnetic field lines trap plasma 203911main_TRACE_loop_arcade_lg.jpg.
In Astronomy
In Astronomy The Ahhhh! (Awe). Starry NightStarry Night Vincent Van Gogh.
glg.ed.ac.uk/courses/field/siccarpt
