Hey,
@Cypress have you ever heard of the Joides Resolution? (NO, of course you haven't! Wikipedia that mofo asap). Here's a fun article from them.
"When I visited them yesterday I came across a calibrating discussion between the scientist. They were working to standardize their methods for observing the relative percentages of one grain size group to another and to give detailed analysis of the contents of smear slide samples taken from the cores. This would help them better describe what was in the layers of sediment found and piece together the story of the South China Sea, its climate and sea levels in the geologic record. Because I had taken a soil science course ages ago I wondered aloud if they were able to get enough sample of the core to use the classic texture by feel method to estimate amounts of clay, sand, and silt in the soil.
“Well no, but it is easy to tell if you just eat a little bit of the mud.” Julie Schindlbeck told me. Turns out, that is thing with Geologists. Sediment sampling by mouth. The biology major in me thinks, again out loud, of course this makes sense because you probably have more nerve endings on your lips than your fingers. However, to a geologist it comes back to minerals and the Mohs hardness scale and whether or not what is in you mouth is scratching you teeth!
...
David Peate, who very matter of factly summed up the discussion with an agreement, “Sometimes you just need to get down and lick the rocks!”"