Lacawac Hiking Trails
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Hummock and Hollow microtopography

Hummocks and hollows (pits and mounds) are micro-topographical formations found on the forest floor. These features form when a tree is uprooted. The cause of a tree to uproot is usually due to the wind, this process is known as windthrow.

The pit forms as the roots are pulled up and still hold on to the surrounding soil, thus forming a small pit. The mound forms as the roots, soil, and other organic matter decays. Over time a small mound will form besides the pit. And soon enough the tree trunk and roots decompose, leaving the fully formed pit and mound formation.These formations are often indicative of an old-growth forest. 


Question: Can you hypothesize how old the forest at Lacawac is based on the pits and mounds you see on the forest floor?
Picture

Location

About lacawac sanctuary

Lacawac Sanctuary Field Station and Environmental Education Center is an independent, non-profit, environmental education organization located on the shore of Lake Wallenp​aupack in the Northern Poconos.  We operate solely on program fees, memberships, sponsorships, grants and private donations from people like you

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  • Home
  • About
    • Sources
    • Contact Us
  • Visitors Center
    • Native Plant Garden
    • Bees
    • Weather Station
  • Historic Great Camp Trail
    • Connell Park
    • Sustainable Forestry
    • Hemlock Woolly Adelgid
    • Early Years
    • Field Station
  • Lake Lacawac Trail
    • White Pine
    • Eastern Hemlock
    • Sphagnum Moss
    • Blueberry Bushes
    • Bog Plants
    • Lake Lacawac
    • Glacial Bog
    • Pickerelweed
    • Diversity of Birds
    • Glacial Erratic Rock
    • American Black Bear >
      • Diet
      • Population
      • Reproduction
  • Big Lake Trail
    • Food Web
    • North American Beaver
    • Osprey
    • Watershed
    • Japanese Barberry >
      • Characteristics
      • Threat to Forest
      • Control Methods
    • Minerals & Rocks >
      • Minerals
      • Igneous Rocks
      • Sedimentary Rocks
      • Metamorphic Rocks
      • Identification
    • Sugar Maple
    • Streams
    • Hydroelectric Dam
    • Lake Wallenpaupack >
      • Electricity Generation
      • Recreation
      • Watershed Management
    • Wild Grapevines
    • Hayscented Fern
  • Maurice Broun Trail
    • Fields & Meadows
    • Stone Walls
    • Gypsy Moth Caterpillars
    • Oak Trees >
      • White Oak
      • Red Oak
      • Black Oak
    • Raccoons
    • Owls
    • Snakes >
      • Snake ID
    • Bats >
      • Bat Houses
  • Ledges Trail
    • Deer Exclosures
    • Geological Faults >
      • Normal Fault
      • Reverse Fault
      • Strike-slip Fault
    • Wild Orchids
    • Ledges
    • Ferns
    • Mosses & Lichen
    • Vernal Pools
    • Mushrooms
  • Warbler Trail
  • Partner Ridge Trail
  • Watres Trail
    • Edge Effect
    • Hummocks and Hollows
  • Carriage-Lakefront Trails
    • Native Fish
    • Lake Research
    • Aquatic Vegatation
    • Plankton
    • Lake Succession >
      • Oligotrophic Lake
      • Mesotrophic Lake
      • Eutrophic Lake