The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition.
Age: ~500,000 – 424,000 years (Quaternary, Pleistocene) Classification: Sedimentary
Age: 172-168 million years (Jurassic, Bajocian) Classification: Sedimentary
Age: 359 to 345 million years (Lower Carboniferous) Classification: Sedimentary
Age: 423-419 million years (Silurian, Ludlow) Classification: Sedimentary
Age: 488-478 million years (Ordovician, Tremadocian-Arenig) Classification: Igneous/sedimentary
Age: Uncertain (Permian-Carboniferous) Classification: Igneous
Age: 175-171 million years (Middle Jurassic, Aalenian) Classification: Sedimentary
Age: 419 –416million years (Silurian, Pridoli) Classification: Sedimentary
Age: 359 to 345 million years (Lower Carboniferous) Classification: Sedimentary
Age: Neoproterozoic, Precambrian Classification: Sedimentary
Age: Post-Lower Carboniferous Classification: Igneous
Age: 299-251 million years (Permian) Classification: Sedimentary
Age: 444-428 million years (Silurian, Llandovery) Classification: Sedimentary
Age: 423-421 million years (Silurian, Ludlow) Classification: Sedimentary
Age: 359 – 299 million years (Carboniferous) Classification: Sedimentary
Age: 359 to 327 million years (Lower Carboniferous) Classification: Sedimentary
Age: 530-510 million years (Cambrian, Comley Series) Classification: Sedimentary
Age: 245- 228 million years (Triassic, Middle) Classification: Sedimentary
Age: 439-436 million years (Silurian, Llandovery) Classification: Sedimentary
Age: 488-478 million years (Ordovician, Tremadoc) Classification: Sedimentary
Age: 423-419 million years (Silurian, Ludlow) Classification: Sedimentary
Age: 530- 510 million years ago (Cambrian, Comley Series) Classification: Sedimentary
Age: <680 million years (Precambrian, Neoproterozoic) Classification: Igneous/Metamorphic
Age: 444-428 million years (Silurian, Llandovery) Classification: Sedimentary
Age: 426-423 million years (Silurian, Wenlock) Classification: Sedimentary
Age: Ordovician Classification: Igneous
Age: 2.5 million years – present (Quaternary, Pleistocene/Holocene) Classification: Sedimentary
Age: 172-165 million years (Jurassic, Bajocian-Bathonian) Classification: Sedimentary
Age: 411– 398 million years (Devonian, Lower) Classification: Sedimentary
Age: Post-Lower Carboniferous Classification: Igneous
Age: 416 – 397 million years (Lower Devonian) Classification: Sedimentary
Age: 421-419 million years (Silurian, Ludlow) Classification: Sedimentary
Age: ≤566 million years (Precambrian, Neoproterozoic) Classification: Igneous
Age: 428-426 million years (Silurian, Wenlock) Classification: Sedimentary
Age: 443-428 million years (Silurian, Llandovery) Classification: Sedimentary
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