Can a TIFF have three 8-bit channels and one 16-bit channel?

[Greg Coats]

Is it possible to combine one TIFF image with three 8-bit channels for Red, Green, & Blue, with another TIFF image with one 16-bit channel (representing the Digital Elevation Model for the same area as the RGB image) into a single four-channel TIFF? Can a TIFF have three 8-bit channels and one 16-bit channel?

[magick]

Tiff appears to have one global bits-per-sample setting which suggests all channels must be of the same depth for a particular image. You of course could have different depths for multiple frames in the same TIFF image. If you discover otherwise, let us know.