Layer Estimates:

Layer: nhgis0001_shapefile_tl2010_060_block_2010 (ID:0)
Count: 708078
Extent:

XMin: -13916402.9791081
YMin: 3688945.52573935
XMax: -12668559.5102616
YMax: 5381495.17678359
Spatial Reference: 102100 (3857)