KREEP

KREEP, an acronym built from the letters K (the atomic symbol for potassium), REE (Rare Earth Elements) and P (for phosphorus), is a geochemical component of some lunar impact breccia and basaltic rocks. Its most significant feature is somewhat enhanced concentration of a majority of so-called `incompatible` elements (those that are concentrated.....
Found on http://en.wikipedia.org/wiki/KREEP

KREEP

a suite of lunar lavas, relatively enriched in certain elements, that were identified in the analysis of rock samples that Apollo astronauts brought ... [1 related articles]
Found on http://www.britannica.com/eb/a-z/k/51

KREEP

Sample of lunar KREEP, with a mass of 82 grams, collected by Apollo 12. Scale shown is in cm. Image: NASA Johnson Space Center Lunar basaltic rock, rich in the radioactive elements uranium and thorium. KREEP is believed to have formed early in the history of the Moon during the solidification o...
Found on http://www.daviddarling.info/encyclopedia/K/KREEP.html
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