| historical (<150 years), well constrained location |
| historical (<150 years), moderately constrained location |
| historical (<150 years), inferred location |
| latest Quaternary (<15,000 years), well constrained location |
| latest Quaternary (<15,000 years), moderately constrained location |
| latest Quaternary (<15,000 years), inferred location |
| late Quaternary (<130,000 years), well constrained location |
| late Quaternary (<130,000 years), moderately constrained location |
| late Quaternary (<130,000 years), inferred location |
| middle and late Quaternary (<750,000 years), well constrained location |
| middle and late quaternary (<750,000 years), moderately constrained location |
| middle and late Quaternary (<750,000 years), inferred location |
| undifferentiated Quaternary(<1.6 million years), well constrained location |
| undifferentiated Quaternary(<1.6 million years), moderately constrained location |
| undifferentiated Quaternary(<1.6 million years), inferred location |
| Class B (various age), well constrained location |
| Class B (various age), moderately constrained location |
| Class B (various age), inferred location |