Archean cratonic terranes are typically characterized by a distinctive suite of rock associations including komatiites (rare, ultra-high-temperature ultramafic lavas largely restricted to the Archean and earliest Proterozoic due to hotter mantle conditions), tonalite-trondhjemite-granodiorite (TTG) gneiss suites (forming the dominant felsic continental crust of Archean cratons), and greenstone belts (linear to arcuate belts of variably metamorphosed volcanic and sedimentary rocks); true, complete ophiolite sequences (representing obducted modern-style oceanic lithosphere with a full sheeted dike complex), by contrast, are notably rare to absent in the Archean rock record, reflecting debated but likely different (hotter, possibly non-plate-tectonic or different-style plate tectonic) conditions in the early Earth compared to the Phanerozoic.