The museum is built upon a foundation of Miocene-era sedimentary rocks overlaid by basalt flows.
Xiaomen Island is physically connected to the main Xiyu Township island by a bridge, allowing easy access to this compact geological site.
The displays demonstrate how the 'Whale Cave' was originally a basalt cliff before wave erosion hollowed out its center.
The museum grounds feature a specific type of 'columnar basalt' that serves as a regional geological signature.
The island hosts unique flora that has adapted to high salt-spray environments, documented within the facility's exhibits.
The Xiaomen Geological Museum serves as the primary interpretive center for the unique basaltic landforms of Penghu County. Situated on Xiaomen Island, it showcases the island's transition from volcanic activity to sedimentary deposition. The facility details the formation of the iconic Whale Cave, a basalt rock arch eroded by wave action. Exhibits explain the geological history of the Penghu archipelago, focusing on column-like basalt formations. The museum integrates geological education with local biodiversity insights. Visitors can study models of the region's complex stratigraphy and tectonic history. It acts as the gateway to the larger Xiaomen Island Geopark trail network.
The observation deck behind the museum overlooking the Whale Cave and the surrounding ocean.
Walk the short outdoor trail behind the museum to view the Whale Cave arch in person.
Visit the geological outdoor display area to see rock samples identified by their mineral composition.
Combine your museum visit with the adjacent traditional stone-walled house displays to see local architectural history.
Do not attempt to climb or walk on the fragile basalt cliff structures, as they are prone to erosion and instability.
Closed during extreme weather events, such as typhoons, which are common in the region.
Maintain a quiet volume and refrain from touching geological samples on display.
