reading bearing wear

here are some pics of the rods and mains i pulled out... other than being junk, i can tell that the engine was most likely rebuilt in a dirty environment. judging from the wear patterns im not sure if dirt was the only cause for premature bearing wear, or if there may be other factors i need to address

Here's the main's


1st main top, 2nd on bottom


3rd main top, 4th main bottom


4th main top, thrust bottom (obviously haha)


additional shot of the dirt grooving



here is the rods




i can get additional pics if neccasary