Clark County NV Archives Obituaries.....Sill, William  March 15, 2008
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Gerry Perry missgerry@cox.net July 4, 2013, 2:23 pm

Las Vegas Review Journal, 3/23/2008
DR. WILLIAM SILL Dr. William D. Sill "Bill," 70, of Las Vegas, died Saturday, 
March 15, 2008. He was a native of Las Vegas, born July 30, 1937, to James M. 
and Louise Sill. He was one of four children, James O. Sill of Eugene, Ore., C. 
Gary Sill (deceased), and Janice Bullock of Centerville, Utah. Bill graduated 
from Las Vegas High School in 1955, then served military service in the U.S. 
National Guard and Army Reserves. He also served a mission for the Church of 
Jesus Christ of Latter-day Saints from 1958 to 1961, in the Argentina Mission. 
He returned to Argentina to work as a petroleum engineer and married his wife, 
Nelida Salinas of Mendoza, Argentina, April 27, 1961. They had four children, 
Zabrina Baird of Las Vegas, Tania Sill of San Antonio, Lynda Dior of 
Taylorsville, Utah, and Bill Sill of Austin, Texas. Bill completed his 
undergraduate studies at Brigham Young University, where he received a B.S. in 
geology in 1963, then went on to Harvard University, where he obtained an M.S. 
in geology in 1965, and a Ph.D. in geology, with special training in vertebrate 
paleontology in 1968. Bill was a research associate at Yale University (1968-
70), professor of paleontology (1971-76), and chairman of the geology 
department (1973-74) at the National University of San Juan, Argentina. He 
changed career paths when he accepted the position of director for Church 
Education Systems in Argentina for the LDS Church (1976-78), director of the 
LDS Institute in Austin, Texas (1978-89), and director of the LDS Institute in 
Norman, Okla. (1989-92.) Bill and his wife returned to San Juan, Argentina, in 
1992, where he was a professor of paleontology at the National University of 
San Juan, and he led field digs into the provincial park Ischigualasto, also 
known as The Valley of the Moon. The Ischigualasto Basin is one of the best 
exposed and most complete Triassic sedimentary sequences in the world. Bill was 
one of its founders and helped to declare it a World Heritage site. He shared 
this treasure with all his loved ones and also introduced Earthwatch volunteers 
to its wonders. Bill is survived by his wife, children, and 12 grandchildren. 
Services will be in Las Vegas and in Austin, Texas. Viewing will be from 4-7 
p.m. Monday, March 24. Funeral service will be at 11 a.m. Tuesday, March 25, 
both at Bunkers Mortuary, 925 Las Vegas Blvd. North. Interment will follow at 
Woodlawn Cemetery, 1500 Las Vegas Blvd. North. If preferred, donations can be 
made to the Perpetual Education Fund, LDS Philanthropies, 15 E. South Temple, 
2nd Floor East, Salt Lake City, UT 84150, in memory of Dr. William D. Sill.



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