The Geology of D.A.R. State Park, Mt. Philo State Forest Park, Sand Bar State Park — A Closer Reading

Direct Address and the Reader as Geologist

Dodge’s prose consistently treats the reader as a fellow investigator. At D.A.R. State Park, he instructs: “The attitude of the rock layers can be seen on a walk down the ramp.” He defines technical terms like “dip” and “strike” in context, using the lake surface as a reference plane. The pamphlet includes figures (e.g., Fig. 2) that illustrate the dip of rocks toward the northwest. This hands-on approach extends to Mt. Philo, where Dodge points out that beach gravels occur “almost 500 feet above the present-day level of Lake Champlain,” inviting the visitor to infer that the mountain was once an island. The text does not merely describe; it equips the reader to make similar observations elsewhere.

Glacial and Marine Evidence Beyond the Catalog Subjects

Although the catalog subjects list only geology and parks, the excerpts devote substantial space to glacial geology and sea-level change. At Mt. Philo, Dodge describes “lake-beach gravels” and “marine beach gravel” (designated “bgm” in Fig. 12), which indicate that an arm of the Atlantic Ocean reached the Champlain Valley. He notes that the “complete story of the lake series is still not known” and cites two external references, including Stewart’s 1961 bulletin. The summary of geologic history traces events from “lower Cambrian time” through glaciation less than 70,000 years ago to the formation of present-day Lake Champlain. This temporal scope—spanning hundreds of millions of years—is not captured by the catalog’s narrow subject headings.

Structure as a Teaching Tool: From Beach to Summit

The pamphlet is organized by park, each with its own introduction and geological description. D.A.R. State Park begins at the beach, where “the rocks are best exposed.” Mt. Philo uses a panoramic view from the west overlook to discuss lake levels and glacial deposits. Sand Bar State Park is introduced as lying on “flat surface of Lamoille River delta.” Within each section, Dodge moves from observable features (rock layers, beach gravels) to broader interpretations (ancient seas, glacial lakes). He includes a “Summary of the Geologic History” that synthesizes the three parks into a regional narrative. This structure mirrors a field trip, guiding the visitor from specific outcrops to regional conclusions.

Readers approaching this pamphlet should bring a willingness to observe rock layers, beach deposits, and landscape forms firsthand. Dodge’s method is cumulative: each park adds a piece of the Champlain Valley’s story. The suggested readings, including Chapman (1937) and Stewart (1961), point to ongoing scientific debate, reminding us that the pamphlet is an invitation to inquiry, not a final word.

I found myself thinking about that old pamphlet on Vermont’s parks, how it made you feel the ground beneath your feet as a story. Fruits of the Hawaiian Islands — Story, Setting & Ideas lingers the same way — less a catalog and more a quiet invitation to notice what’s already growing around you, patiently.