Unassigned
Ar Rika Formation
Kvs2 Member
>700 Ma
Rhyolite, andesite, dacite subordinate tuffite, and andesitic tuff
kvs2
Burudan Complex
Bugs Sheet
~700 Ma
Serpentinized peridotite
bugs3
Kvs3 Member
Clastic sedimentary rocks
kvs3
Gabbronorite or anorthosite
bugs2
Kvs1 Member
Breccia or polymictic conglomerate
kvs1
Kvs4 Member
Marble
kvs4
Quaternary Gravel sheets
Gravel sheets
<1 Ma
Boulders, pebbles, gravel, and sand (inactive)
Qgy
Halaban Ophiolitic Mélange
Block
Htump Block
695-675 Ma
Serpentinite, serpentinized peridotite, and pyroxenite
htump
Htbug Block
Gabbro and subordinate diabase
htbug
Htbum Block
htbum
Al Khushaymiyah Suite
Kygg Unit
610-595 Ma
Granite and granodiorite
kygg
Murdama Group
Umm Sulaym Formation
Mus3 Member
650-620 Ma
Limestone
mus3
Granodiorite
butg
Tonalite, quartz diorite, and diorite
budt
Mus2 Member
Sandstone, graywacke, and subordinate rhyolite
mus2
Layered gabbro
bugs1
Htbuv Block
Basalt and andesite
htbuv
Kyqm Unit
Quartz monzonite, granodiorite, and granite
kyqm
Mus1 Member
Conglomerate and subordinate rhyolite
mus1
Serpentinite
bugs4
Zaydi Formation
Muz1 Member
Conglomerate, polymictic conglomerate, wacke, sandstone, and limestone
muz1
Ajal Group
Swam Formation
Swam3 Member
>695 Ma
Amphibole gneiss and amphibolite
swam3
Muz5s Member
Schistosed sandstone and wacke
muz5s
Muz3 Member
Sandstone and siltstone with strong shearing deformation
muz3
Muz2 Member
Siltstone and sandstone
muz2
743 Ma
Metagranodiorite
ugd
Muz1c Member
Conglomerate and  polymictic conglomerate
muz1c
Dab Formation
Dru1 Member
590-560 Ma
Rhyolite breccia
dru1
Dru2 Member
Rhyolite and rhyolite tuff
dru2
Buraydah Group
Khuff Formation
Pkh Member
Uncertain
Silty gypsiferous claystone and dolomite
Pku
Swam2 Member
Leptynite and quartzite
swam2
Quaternary Khabra deposits
Khabra deposits
Silt, clay, and some sand
Qk
Quaternary Eolian sand
Eolian sand
Dune systems, alignment trends (active)
Qez
Pkh1 Member
Bioclastic and pelletoid dolomite
Pkh1
Quaternary Colluvial deposits
Colluvial deposits
Pebbles, gravel, coarse sand, and silt
Qcy
Pkk1 Member
Calcitic dolomite with stromatolite
Pkk1
Dune systems, alignment trends (inactive)
Qey
Pkm1 Member
Conglomeratic bioclastic lithoclastic and dolomitic limestone
Pkm1
Pkd Member
Intrabioclastic calcitic dolomite, bioclastic pelletoid dolomite, and clayey or silty dolomite
Pkd
Pkm3 Member
Dolomitic claystone
Pkm3
Sheet sand (active )
Qsz
Boulders, pebbles, gravel, and sand (active)
Qgz