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. 
 Select fossil taxa of the Coal Measures
Binomial Name 	Formation	Type of organism 	Notes
Archaeothyris parvidens 	 	Basal synapsid 	Lizard-like; possibly one of the oldest relatives of modern mammals.
Arthropleura latiforma 	 	Centipede 	
Calamites meristematus 	 	Horsetail 	Similar to modern horsetail plants, but reaching heights as tall as 50 meters.
Calamites takumakkensis 	 	Horsetail 	
Cordaites angustifolius 	 	Conifer 	One of the first cone-bearing trees.
Edaphosaurus syltorus 	 	Pelycosaur 	Large sail-backed herbivore.
Hunluanomonstrum gregarium 	 	Bilaterian 	Bizzare indeterminate creature; possibly a worm, fish, mollusk, or something else entirely.
Hunshuithairos hexopterus 	 	Palaeodictyopteran	One of the most primitive insects. Bears six wings.
Ianthasaurus communis 	 	Pelycosaur 	Sail-backed insectivore. Smaller and more primitive than Edaphosaurus.
Ianthasaurus major 	 	Pelycosaur 	
Lepidodendron megastrobilus 	 	Lycophyte 	Tree-like relative of modern quillworts. L. megastrobilus is notable for large spore-bearing organs.
Lobatopterus dentiphyllus 	 	Tree fern 	
Meganeura longiptera 	 	Griffinfly 	Superficially resembles a large dragonfly.
Nirigyrinus sulcatus 	 	Stem-tetrapod 	Amphibious vertebrate classified just outside of crown-group Tetrapoda.
Palaeophiacodon caninophorus	 	Pelycosaur 	Similar to the much larger Ardatian-aged genus Ophiacodon.
Pecopteris sokalis 	 	Tree fern 	
Sigillaria columnata 	 	Lycophyte 	Arborescent, tree-like relative of quillwort plants.
Sigillaria dentisculata 	 	Lycophyte 	
Sphenophyllum strictum 	 	Horsetail 	Vine-like climbing horsetail, unlike modern forms.
Sphenophyllum heterophyllum 	 	Horsetail 	
Category:Geology
Category:Aurlûnor
Category:Prehistory
Category:Traveler's Era