LARGE MINERAL SPECIMEN OF SANIDINE - ORTHOCLASE TUFF, VOLCANIC ASH FROM NEVADA
Item History & Price
| Reference Number: Avaluer:49162525 | Modified Item: No |
THIS IS A LARGE HAND SPECIMEN OF SANIDINE - ORTHOCLASE TUFF (VOLCANIC ASH). THE SPECIMEN IS APPROXIMATELY 13 X 9 X 8 cm. IT WEIGHS 501.5 gm . THE SPECIMEN IS FROM PANACA, LINCOLN CO., NEVADA. THE SPECIMEN IS FROM THE PANACA FORMATION - PLIOCENE EPOCH. IT IS A LACUSTRINE DEPOSIT (LAKE DEPOSIT). THE ASH FELL AND FORMED A VERY PURE MASS IN THE FRESH WATER LAKE ABOUT 14 FEET THICK OF VERY PURE, FRIABLE TUFF. THE TUFF HAS BEEN IDENTIFIED BY ED...S-SEM AND IS INTERMEDIATE BETWEEN SANIDINE AND ORTHOCLASE-MICROCLINE FELDSPAR. INDIVIDUAL CRYSTAL GRAINS THAT COMPRISE THE TUFF ARE ANGULAR AND <0.15 mm IN MAXIMUM DIMENSION. IT IS UNUSUAL AND INTERESTING EDUCATIONAL MATERIAL. INCLUDED IS A SMALL BOTTLE OF THE VOLCANIC ASH AND A COPY OF THE EDS REPORT. THE ASH WAS MINED BRIEFLY AND USED AS A POZZOLAN IN CEMENT. ADDITIONAL SPECIMENS ARE AVAILABLE IN ANY SIZE RANGE. THIS IS AN EXCELLENT CLASSROOM EXAMPLE OF A "TUFF" VS A "WELDED TUFF". THIS "TUFF" CAN BE CRUSHED IN THE HAND. PLEASE CONTACT ME IF THERE ARE ANY QUESTIONS ABOUT THIS SPECIMEN. SEE PICTURES. I WILL COMBINE SHIPPING WHEN POSSIBLE. THANKS FOR LOOKING.
