1. Shale that is rich in humic acids

Type of: humate, shale

• Helix hortensis
• Helix pomatia
• hell
• hell dust
• hell on earth
• hell raising
• hell to pay
• Hell's Half Acre
• Hell's Kitchen
• hell-bent
• hell-for-leather
• hell-kite
• hell-rooster
• Helladic
• Helladic civilisation
• Helladic civilization
• Helladic culture
• hellbender
• hellbound
• hellcat
• hellebore
• helleborine
• Helleborus
• Helleborus foetidus
• Helleborus niger