M. L. Jackson's classic weathering sequence of clay-size minerals in soils consists of 13 stages.

• 13: Jackson's weathering sequence arranges minerals in 13 progressive stages, spanning from most easily weathered (Stage 1: Gypsum) to the most resistant residue (Stage 13: Anatase, Rutile, Zircon).
• Weathering index divisions in specific geomorphological systems, not Jackson's scheme.
• 11: An incomplete enumeration of mineral stages.
• 9: Represents the intermediate dioctahedral mica/vermiculite stages.

• Hydrolysis involves the chemical cleavage of bonds by water molecules creating hydroxyl and hydrogen ions.
• Hydration is the chemical addition of intact water molecules into the crystal lattice of a mineral without forming new ionic species; converting anhydrous calcium sulphate (anhydrite, CaSO4) into gypsum (CaSO4.2H2O) is a classic mineral hydration reaction: CaSO4 + 2H2O -> CaSO4.2H2O.
• Oxidation involves loss of electrons or increase in oxidation number.
• Solution involves complete dissociation and dissolving of mineral ions into water.

• Represents partial susceptibility order but does not match the official key sequence.
• Alternative susceptibility listing.
• According to Samuel Goldich's mineral stability series, the resistance of primary silicate minerals to chemical weathering follows the sequence from most stable/resistant to least stable: Quartz > Muscovite > Potash feldspar (Orthoclase) > Biotite. Thus, in terms of weathering stability, Quartz > Muscovite > Potash feldspar > Biotite is the correct sequence.
• Biotite is far less resistant than potash feldspar.

• Lacustrine deposits are sediments settled in quiet lake waters.
• Alluvial deposits are transported and deposited by flowing river water.
• Moraines (terminal, lateral, medial, or ground moraines) are irregular accumulations, ridges, or hilly mounds of unstratified, unsorted glacial debris and till deposited directly by melting glaciers.
• Colluvial materials are rock fragments transported downslope by gravity.