Ideas in this flowchart

• Notation of transitional and related soil horizons
• Transitional horizons combine the properties of two adjacent horizons.
• They are identified with two capital letters.
• The first letter represents the dominant process.
• Examples include AB and BA.
• Notation such as E/B indicates distinct areas of each horizon rather than a smooth transition.
• Numbers distinguish repeated horizons or different layers.
• Numbers can distinguish repeated horizons.
• Numbers can indicate layers formed from different parent materials.