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Hawthorn Group

October 28, 2023

The Hawthorn Group is a stratigraphic unit that includes several geologic formations of Late Oligocene to Pliocene age in North Florida, United States. It is known for its phosphate rock resources, and for its rich assemblages of Neogene vertebrate fossils. It was originally called the Waldo Formation by L.C. Johnson of the United States Geological Survey in 1887, and later became the Hawthorne Group named for Hawthorne, Florida, where its phosphate-rich rock was quarried and processed for use as fertilizer.[1]

Hawthorn Group
Stratigraphic range: Miocene
TypeGroup
Sub-units(See text)
OverliesOcala Limestone
Thickness> 330 feet
Location
RegionNorth Florida
Country United States
Type section
Named forHawthorne, Florida
Named byL.C. Johnson, 1887
Location of the Hawthorn Group within Florida (in red).

Age edit

Period: Neogene
Epoch: Miocene
Faunal stage: Chattian through early Blancan ~28.4 to ~2.588 mya, a period of 25.512 million years

Location edit

The Hawthorn Group extends from Suwannee County in the north and southward to Hernando County. It encompasses in part the counties of Gilchrist, Levy, Dixie, Citrus, Sumter, Alachua and Marion County. The Hawthorn is also present below undifferentiated sediments (TQu) as well as the Tamiami Formation from Polk County south through Highlands, Glades, Hendry, Dade, Collier, and Monroe County at depths ranging from mean sea level near Polk to below 600 meters in Monroe Co.[2] The Hawthorn overlies Ocala Limestone[3]

Sub-units edit

Paleofauna edit

Reptiles

Birds

Mammals

References edit

  1. ^ Geology of Florida: Miocene to Holocene. University of Florida Geology
  2. ^ USGS Florida Geology
  3. ^ Glen L. Faulkner, Geological Survey (U.S.), United States. Army. Corps of Engineers, Geohydrology of the Cross-Florida Barge Canal area, Tallahassee, 1973.
  • USGS: Florida Geology
  • Paleobiology database: Love Bone Bed Collection

October 28, 2023
hawthorn, group, stratigraphic, unit, that, includes, several, geologic, formations, late, oligocene, pliocene, north, florida, united, states, known, phosphate, rock, resources, rich, assemblages, neogene, vertebrate, fossils, originally, called, waldo, forma. The Hawthorn Group is a stratigraphic unit that includes several geologic formations of Late Oligocene to Pliocene age in North Florida United States It is known for its phosphate rock resources and for its rich assemblages of Neogene vertebrate fossils It was originally called the Waldo Formation by L C Johnson of the United States Geological Survey in 1887 and later became the Hawthorne Group named for Hawthorne Florida where its phosphate rich rock was quarried and processed for use as fertilizer 1 Hawthorn GroupStratigraphic range MioceneTypeGroupSub units See text OverliesOcala LimestoneThickness gt 330 feetLocationRegionNorth FloridaCountry United StatesType sectionNamed forHawthorne FloridaNamed byL C Johnson 1887Location of the Hawthorn Group within Florida in red Contents 1 Age 2 Location 3 Sub units 4 Paleofauna 5 ReferencesAge editPeriod NeogeneEpoch MioceneFaunal stage Chattian through early Blancan 28 4 to 2 588 mya a period of 25 512 million yearsLocation editThe Hawthorn Group extends from Suwannee County in the north and southward to Hernando County It encompasses in part the counties of Gilchrist Levy Dixie Citrus Sumter Alachua and Marion County The Hawthorn is also present below undifferentiated sediments TQu as well as the Tamiami Formation from Polk County south through Highlands Glades Hendry Dade Collier and Monroe County at depths ranging from mean sea level near Polk to below 600 meters in Monroe Co 2 The Hawthorn overlies Ocala Limestone 3 Sub units editArcadia Formation Coosawhatchie Formation Miocene Pliocene Peace River Formation Miocene Pliocene Statenville Formation Miocene Torreya Formation Miocene Paleofauna editReptiles Apalone ferox Florida Softshell Turtle Pseudemys caelata Pond Turtle Terrapene Box Turtle Deirochelys Chicken Turtle Geochelone Tortoise Alligator mississippiensis American Alligator Gavialosuchus americanus or Thecachampsa antiqua American Crocodile Typhlops Blind snake Xenodontinae Mud Snake Heterodon Hognose Snake Elaphe Rat Snake Lampropeltis getulus Kingsnake Nerodia Water snake Thamnophis Garter Snake Crotalinae Lancehead Rattlesnake Sistrurus Rattlesnake Birds Anserinae Swan Podicipedidae Grebe Phalacrocoracidae Cormorant Anhinga grandis Snakebird Ciconiidae Stork Phoenicopteridae Flamingo Ardea Heron Egretta Egret Ardeola Heron Aramidae Limpkin Gruidae Crane like Rallidae Crakes amp Coots Cathartidae New World Vulture Pandionidae Osprey Accipitridae Eagle Passeriformes Songbird Mammals Metaxytherium floridanum Sea Cow Gomphotherium Elephant Tapirus simpsoni Tapir Teleoceras proterum Rhinoceros Aphelops malacorhinus Rhinoceros Pseudhipparion skinneri Horse Hipparion tehonense Horse Neohipparion trampasense Horse Nannippus westoni Horse Hippotherium ingenuum and H plicatile Horse Calippus cerasinus and C elachistus Horse Protohippus gidleyi Horse Microchiroptera Microbat Leptarctus Mustelidae Hoplictis Mustelidae Plionictis Mustelidae Sthenictis lacota Mustelidae Arctonasua floridana Raccoon Paranasua biradica Leptocyon Epicyon haydeni and E saevus Proto dog Nimravides galiani False Saber tooth cat Barbourofelis loveorum False Saber tooth cat Antilocaprinae Antilope Pseudoceras Early horse type ungulate Yumaceras hamiltoni Camel like Cetacea Whale Aepycamelus major Camel Procamelus grandis Camel Hemiauchenia minima Camel Talpidae Mole Soricidae Shrew Archaeolaginae Rabbit Sciuridae Squirrel Eucastor planus Beaver Abelmoschomys simpsoni Vole Mylagaulus elassos Horned gopher References edit Geology of Florida Miocene to Holocene University of Florida Geology USGS Florida Geology Glen L Faulkner Geological Survey U S United States Army Corps of Engineers Geohydrology of the Cross Florida Barge Canal area Tallahassee 1973 USGS Florida Geology Paleobiology database Love Bone Bed Collection Retrieved from https en wikipedia org w index php title Hawthorn Group amp oldid 1075184623, wikipedia, wiki, book, books, library,

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