Two oversized sheets: 54" x 47" and 50" x 42". This color state geologic map, published in July , is the first geologic map of New Mexico to be published at this scale since Close to 20 years in the making, this map reflects the collective efforts of geologists from throughout the state. Over geologic units are represented.
The rare earth elements REE are a group of 17 metals that comprise the lanthanide series of elements lanthanum La , cerium Ce , praseodymium Pr , neodymium Nd , promethium Pm , samarium Sm , europium Eu , gadolinium Gd , terbium Tb , dysprosium Dy , holmium Ho , erbium Er , thulium Tm , ytterbium Yb and lutetium Lu in addition to scandium Sc and yttrium Y , which show similar physical and chemical properties to the lanthanides. Rare earth elements are a relatively abundant group of elements that range in crustal abundance from cerium at 60 parts per million ppm to lutetium at 0. The REE have unique catalytic, metallurgical, nuclear, electrical, magnetic and luminescent properties. Their strategic importance is indicated by their use in emerging and diverse technologies that are becoming increasingly more significant in today's society. Applications range from routine e.
Uranium—lead dating , abbreviated U—Pb dating , is one of the oldest  and most refined of the radiometric dating schemes. It can be used to date rocks that formed and crystallised from about 1 million years to over 4. The method is usually applied to zircon. This mineral incorporates uranium and thorium atoms into its crystal structure , but strongly rejects lead when forming.