In another forum far far away, we've been having a discussion about some ocean floor topography that one would think would be addressed in every geology textbook, but I'm having a hard time finding something that specifically addresses these features. And the features are HUGE! They appear to be simple fracture zones. But the features are so long one would think they would be named features. I'm talking about the very long linear features that form multiple triangles on the ocean floor in the Western Atlantic. I'm talking about the features which are closer to the US coast line, not those which transect the Mid-Atlantic Ridge in the following images: See linear features here (http://www.ngdc.noaa.gov/mgg/image/2...50/45N090W.jpg) Same features visible here (http://topex.ucsd.edu/marine_topo/gi...rack/topo8.gif) In the Pacific there are similar features but they are regularly spaced at various latitudes and there are fewer which transect creating triangles. All the info I find refers to fracture zones but show the much shorter fractures which transect the Mid-Atlantic Ridge. Just Google Earth the Pacific Ocean floor to see the parallel Pacific Ocean floor fracture lines. Are these simply crustal plate fractures? What makes them stay so perfectly linear for so many thousands of kilometers? Why are the ones in the Pacific more parallel and why so evenly spaced? Why are those in the Atlantic not parallel? I am currently fascinated by the fact these lines haven't garnered more specific attention in the geology text books.