Blog of the Pennsylvania State Historic Preservation Office

Category: Archaeology (Page 1 of 19)

Radiocarbon Dating: A look at the last 80 years

One of the fundamental concepts in archaeology is the Law of Superposition, which states that older material is located underneath more recent material. So generally, on an archaeological site, the deeper you dig, the older the materials will be. It’s a simple concept that at times can require a good amount of interpretation and investigation. But for archaeologists before the mid-20th century, the law of superposition provided the only means of estimating the age of objects at an archaeological site.

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A Glimpse into the PASS: The 2025 Annual PASS Report

The Pennsylvania Archaeological Site Survey (PASS) is the Commonwealth’s inventory of recorded archaeological sites. The program officially started in the late 1970s—when site files held by the Carnegie Museum of Natural History were combined with those kept by the State Museum of Pennsylvania—but it was built on a foundation of nearly 100 years of site recording by numerous institutions and individuals across the state. Since that time, the PASS files have been kept in a centralized repository at the SHPO, where they are now submitted, archived digitally, and made available to qualified archaeologists and researchers through PA-SHARE.

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Experimental Archaeology at the Historical and Museum Commission: Building a Dugout Canoe

In painstakingly precise recreations, archaeologists of the Pennsylvania Historical and Museum Commission (PHMC) created three vessels during the innovative outreach program, the Pennsylvania Dugout Canoe Project, which educated thousands of visitors about this fascinating aspect of travel by Native Americans. This project, which concluded in 2005, was done through public programs using replicated historic and/or prehistoric tools and techniques.

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