Sokalis Coal Measures

The Sokalis Coal Measures are a series of coal-rich mudstones and siltstones in central Aurlûnor varying between 330 and 270 million years old, spanning nearly the entire Tyrfinic Period. In fact, the upper boundary of the Tyrfinic is defined by the top of the Sokalis Coal Measures. The Coal Measures are not a single formation, but consist of several over- and underlying formations in the same area.

The name of the Sokalis Coal Measures comes from the old name of the city of Hloamar. The name Sokalis means "Sun City" in the Takumakken Krow language, and many older geologic terms were coined with this name prior to the city's reclamation by the Aurlûnor Velande. Despite many Aurlûnoren paleontologists being members, the Rathnir Paleontological Society has not updated the name.

The coal seams of the Coal Measures are comprised primarily of valuable anthracite. It is this coal that powers much of the fledgling industry of Hloamar city, and makes the region economically important. Bituminous coal is also abundant. The remaining sedimentary rocks contain various plant and animal fossils.