During which time period was the surface bedrock at this location formed?

To determine the time period during which the surface bedrock at a specific location was formed, one would typically need to refer to geological maps or studies specific to that area. Bedrock formation can vary widely based on geological history, ranging from billions of years ago during the Precambrian era to more recent formations in the Cenozoic era. If you provide the exact location, I can help narrow down the timeframe based on known geological data.