Lines of constant time required for compaction of chondritic material of H chondrites at different temperature and pressure conditions. The upper group of lines corresponds to the sintering of chondrules with 0.5 mm diameter. The middle group corresponds to the sintering of matrix material with particle diameters of 2 μm. The numbers at the lines show the time required for compaction (in Ma). The lower group corresponds to the sintering of fine dust material with particle diameters of 0.2 μm. The blue dashed line corresponds to the highest temperatures achieved at a radius during the evolution of model LM3 for the parent body of the L chondrites and the pressure at that depth. The crosses correspond to radial positions with a 1.5 km distance from each other. The horizontal dash-dotted lines correspond to the incipient melting of a Fe,Ni-FeS eutectic at 1223 K for L chondrites (Tomkins 2009) and that of silicates at 1440 K.