The New Senator Caldera is a large Archean caldera complex within the heart of the Blake River Megacaldera Complex, Quebec, Canada.

It has a diameter of 15-30 kilometers and is made of thick massive mafic sequences.

[1] Gabbro sills represent lava lakes, which are common in mafic summit calderas.

The Kiwanis (Norands) intrusion, a high-level synvolcanic magma chamber, intrudes felsic rocks, and is in turn cross-cut by basaltic dikes and sills.

The Glenwood fault forms the eastern margin of the New Senator Caldera.