Layer Estimates:

Layer: Plate Boundaries (ID:0)
Count: 241
Extent:

XMin: -20037507.0672
YMin: -9921655.5493
XMax: 20037507.0672
YMax: 22830519.4992
Spatial Reference: 102100 (3857)

Layer: Tectonic Plates (ID:1)
Count: 54
Extent:

XMin: -20037507.0672
YMin: -30240971.9584
XMax: 20037507.0672
YMax: 30240971.9584
Spatial Reference: 102100 (3857)