Thorium-232-lead-208 and uranium-238-lead-206 radiometric ages for ore-stage calcite show that Mississippi Valley-type (MVT) ore deposits can form in distinct tectonic settings.
An age of 251 ± 11 million years for the Jumbo Mine in Kansas, United States, is in agreement with other ages for MVT deposits in the midcontinent of North America.
But 19th century (and some newer) books are often not dated. Author bibliographies are sometimes enlightening, especially in the case of first editions and other early editions.
Many reprint publishers did not include dates, either. Some are available online; others will be accessible through your local library.
Dr Christopher Price - Obstetrician, Gynaecologist and Laparoscopic surgeon - works exclusively in private practice from his consulting rooms at the North West Specialist Centre in Everton Park, Brisbane.
He provides the most up-to-date obstetric and gynaecological treatments on-site at the North West Brisbane Private Hospital.
Also on the December menu are premiere episodes of fan-favorite shows including Eat St., My Grandmother's Ravioli and Restaurant Redemption.
Nigella Lawson brings her Italian recipes to Cooking Channel in new series Nigellissima premiering Saturday, December 7th at am ET/am PT as she shares her secrets on creating easy and seasonal dishes for home cooks.
Premiering Saturday, December 7th at am ET/am PT Nigella introduces viewers to her love of Italian food through a spectacular yet simple Sicilian pasta with tomatoes, garlic and almonds.Then, she serves up a midweek family feast of Tagliata - a juicy steak cut into thin slices - served with crisp, fluffy Tuscan fries.She also serves up 'eggs in purgatory' - a late night fiery dish inspired by her early days in Florence.You might also research the publisher to see what dates they were in business, and at what locations.Often businesses move during the course of their lifespans; the known date at a given address can be compared to the publisher’s address printed in the book.