Archive / #LU109
#LU109

Geological Feature

Type
Geology
Class
Geology
Status
Recently Explored
Depth
—
Dimensions
15' × 8'
Natural Rock Formation (LU109), Lake Union, Seattle, WA — main photo

Overview

Shipwreck City Data

This target has been classified as a sedimentary rock formation, measuring roughly 15 feet by 8 feet. No depth is currently recorded for the target. The formation sits low against the lakebed and consists of a broad, irregular exposure of layered rock, with portions partially embedded in sediment. Visible features include numerous thin, overlapping sedimentary layers with pronounced horizontal to gently banding, broken and eroded edges, and several sections where individual layers project outward from the main formation.

Prior Research and Theories

No corresponding prior documentation from Coastal Sensing & Survey, DCS Films, or the Lake Union Virtual Museum has been identified for this target in the material reviewed to date.

Additional Context

Shipwreck City is actively researching the geologic history of the Puget Sound region to better understand the natural processes that shaped Lake Union and the surrounding landscape. As we learn more, additional geological context may be added to this target and other geological features documented in the archive.

Links & Resources

Coastal Sensing & Survey: No record available from this source for this target

DCS Films: No record available from this source for this target

Lake Union Virtual Museum: No record available from this source for this target

Field data
Catalog#LU109
Vessel typeGeology
MaterialSedimentary Rock
StatusRecently Explored
Dimensions15' × 8'
ROV Dive Date5 May 2026
LocationLake Union, Seattle
Target Archive