Dan L. Mosier has over 35 years of experience as a geologist (BA, SFSU; MS, CSUH) and over 43 years of experience as a historical researcher.
He is author or coauthor of over 75 scientific papers, over 50 articles on history and genealogy, and 9 books on local history, among which
include History of Tesla, A California Coal Mining Town and Alameda County Place Names.
In 1970, he began collecting and researching marked bricks. In 1990, while studying the bricks of the Carnegie Brick and Pottery Company,
whose brickyard was located in San Joaquin County, California, he questioned if Carnegie bricks could be distinguished
from other bricks in the absence of the brand name. Thus began his detailed study of bricks, using the book Bricks and Brickmaking
by Karl Gurcke, and using archaeological methods, which were studied under Archaeologists Phil Hines and Beth and Chris Padon. Combining his interests in
mineralogy, history, and archaeology, he devised a method of identifying the makers of bricks. In 2001, he launched the California Bricks
website to publish his brick research and to help archaeologists identify bricks from California. He has maintained a database and archives on
California bricks. In 2011, he was nominated for the Crabtree Award for outstanding advocational archaeologist by the Society for American Archaeology.
In 2013, he was awarded the Mark Raymond Harrington Award for archaeological conservation by the Society for California Archaeology.