<Earthy History Map Markers>
1. Earth Brown - 
          
          #8B5B29
        - A rich, warm brown reminiscent of fertile soil, perfect for grounding historical contexts.
2. Olive Green - 
          
          #5B8C29
        - A muted green that symbolizes growth and nature, ideal for representing ancient civilizations.
3. Terracotta - 
          
          #D2693D
        - A warm, clay-like orange that evokes rustic pottery and ancient architecture.
4. Sandy Beige - 
          
          #D6CDAF
        - A light, neutral beige that represents the sands of time and archaeological sites.
5. Slate Gray - 
          
          #7A7B7A
        - A cool, muted gray that provides a modern touch while symbolizing stone and endurance.
6. Rust Red - 
          
          #C85A3B
        - A deep reddish-brown that reflects the aged patina of historical artifacts.
7. Dusty Olive - 
          
          #A49A7C
        - A soft, muted olive tone that conveys a sense of history and natural landscapes.
8. Clay Gray - 
          
          #B1A7A1
        - A gentle gray with clay undertones that represents the essence of ancient pottery and remains.
9. Forest Green - 
          
          #2E4D2B
        - A deep green that symbolizes the richness of nature and the longevity of history.

This earthy color palette consists of warm and muted tones that reflect the natural world and the essence of historical subjects. Each color is thoughtfully chosen to evoke a sense of age and authenticity, making it suitable for map markers representing various history categories.

Would you like to specify any particular history subjects for which the colors should be tailored? Or do you need any additional design elements to accompany this palette?