The travellers encountered countless outcrops of broken hills, layers of sedimentary rock from black or purple ash
, fragmented clay and brittle sandstone.
It is formed by well stratified sets of well sorted gray and purple ash
beds, with cyclic gradation of pumice, interbedded with tabular massive and poorly sorted pumice, lapilli and blocks beds; most of the fragments being accidental and intensely altered.
Hemlock Cottonwood Chestnut Oak Purple Ash
Persimmon Silver Maple Hickory Pecan Heckberry
black cherry purple ash
crab apple box elder red oak juniper white oak Serbian spruce grey birch hemlock paper birch slippery elm red horse chest nut red mulberry catalpa red maple weeping willow silver maple stag horn sumac Japanese maple ginkgo hickory hawthorn honeylocust sugar maple hackberry redbud persimmon dogwood pecan sweet gum cottonwood chestnut oak green ash yellowwood
ages six and under) Crab Apple Black Cherry Red Oak Ginkgo White Oak Paper Birch Catalpa Redbud Weeping Willow Dogwood Hawthorn Sweet Gum Stag Horn Sumac Grey Birch Red Horse Chestnut Sugar Maple Green Ash (ages seven to twelve add these) Hemlock Box Elder Cottonwood Red Mulberry Chestnut Oak Serbian Spruce Purple Ash
Slippery Elm Persimmon Juniper Silver Maple Japanese Maple Hickory Yellowwood Pecan Red Maple Hackberry Honeylocust
Under seven black cherry crab apple red oak white oak grey birch paper birch red horse chestnut green ash catalpa weeping willow stag horn sumac ginkgo hawthorn sugar maple redbud dogwood sweet gum Over seven All of the under sevens, plus these: chestnut oak yellowwood purple ash
box elder juniper Serbian spruce hemlock slippery elm red maple silver maple Japanese cottonwood hickory honeylocust hackberry persimmon pecan red mulberry