Magnetic resonance imaging (MRI) has failed to distinguish between smaller gut regions and larger haemal sinuses in sea urchins (Echinodermata: Echinoidea)
A response to Ziegler A, Faber C, Mueller S, Bartolomaeus T: Systematic comparison and reconstruction of sea urchin (Echinoidea) internal anatomy: a novel approach using magnetic resonance imaging. BMC Biol 2008, 6: 33.
Based on systematically analyzed the structural configuration and coal controlling structures in the Muri coalfield,and become conscious of the zonality of the coalfield.Thus south,middle and north three structural belts,west,middle and east three sectors are divided and discussed their relations between coal measures hosting and structures.The study reckoned:the coalfield is a ramp basin,in forelands of the Datong Mountains and Tulai Mountains,thrusting is very strong,coal seams uplifted,buried depth becomes shallower,in favor to mining,but they are seriously destructed;while in middle part,because of less crustal stress,coal-bearing syncline rather be well preserved,but coal seam buried depth is deeper.