Showing 126 - 150 of 155 results for dateable
Plant Macrofossil (Betula papyrifera)
subfossil specimen; note remnant of wings, persistent stigmas, characteristic size and shape (elliptic, 1.5-3 mm)

Plant Macrofossil (Betula papyrifera)
3 lobed, lobes divergent, forming cross-like or fleur-de-lis shape. 6-12 mm.

Plant Macrofossil (Carex backii)
rounded trigonous, obovate, inconspicuously veined, 4-5.4 mm; beak 2 mm long, inconspicuously serrate

Plant Macrofossil (Rudbeckia triloba)
oblong, tapering slightly to base; 2-2.5 mm long; 4 sided

Plant Macrofossil (Quercus macrocarpa)
nut depressed to narrowly ovate, 2-5 cm long, 2-4 cm wide; cup covering 1/3 to 3/4 of nut; marginal cup scales awned, fo...

Plant Macrofossil (Quercus macrocarpa)
nut depressed to narrowly ovoid, 2-5 cm long, 2-4 cm wide; cup covering 1/3 to 3/4 of nut; marginal cup scales awned, fo...

Plant Macrofossil (Quercus velutina)
nut ovoid, 6-13 mm long; cup bowl shaped, covering 1/2 of nut; large, pubescent scales; marginal scales projecting, formi...

Plant Macrofossil (Quercus velutina)
nut ovoid, 6-13 mm long; cup bowl shaped, covering 1/2 of nut; large, pubescent scales; marginal scales projecting, formi...

Plant Macrofossil (Morus rubra)
oval-lenticular to ovate, 1.5-3 mm long; a light colored, slender attachment stalk appressed to thinnest edge of seed; in...

Plant Macrofossil (Claytonia virginica)
oval-lenticular, 1-2 mm; black, very shiny; note marginal cleft plugged with white material

Plant Macrofossil (Fraxinus americana)
fruit linear to oblanceolate, 3-5 cm; wing extending 1/3 the length of the body

Plant Macrofossil (Fraxinus pennsylvanica)
fruit linear to spatulate, 2.5-7.5 cm long; wing extending ~1/2 the length of body

Plant Macrofossil (Platanus occidentalis)
lanceolate, ~8-9 x 1-1.5 x 1 mm; tuft of stiff hairs pointed upward from base (oriented as top in image); style base pers...

Plant Macrofossil (Ranunculus abortivus)
lenticular in cross-section, elliptic in outline, ~1.5 mm long; beak present, but very short

Plant Macrofossil (Sambucus canadensis)
elliptic-ovate in outline compressed triangular in cross section, 2-3 mm long; very slightly arched inward; crosswise wri...

Plant Macrofossil (Silene nivea)
rounded, kidney shaped, 0.5-1.5 mm long; dark tipped, cone shaped tubercles (warty bumps) in concentric rows, increasing ...

Plant Macrofossil (Silene stellata)
compressed kidney shaped, 0.5- 1 mm; rounded, irregular shaped tubercles (warty bumps) concentric from hilum (seed base)

Plant Macrofossil (Stellaria aquatica)
oval-orbicular, ~1 mm long; surface is hoarfrost patterned; margins covered in large, rounded tubercles (warty bumps)

Plant Macrofossil (Leersia oryzoides)
flattened oval, 4-5 mm long, 1-2 mm wide; lemma with conspicous bristles

Plant Macrofossil (Populus tremuloides)
ovate, minute, 0.5-0.8 mm; covered in white hairs; conspicuous white-light yellow base

Plant Macrofossil (Gleditsia triacanthos)
abaxial side (bottom of leaf) pictured; oblong-lanceolate, 2-4 cm long (mature trees) or 1-2 cm long (young trees); weakl...

Plant Macrofossil (Salix amygdaloides)
adaxial side of leaf (top of leaf) pictured; thin, lanceolate to lance-ovate, 5-10 x 1-3.5 cm; 3-6 times as long as wide,...

Plant Macrofossil (Chenopodium album)
circular-lenticular, 1-2 mm wide; more spherical relative to other Chenopodium spp.; rounded margins; note notch in margi...

Plant Macrofossil (Chenopodium pratericola)
circular-lenticular, 1-2 mm wide; shiny, textured, plump disk; rounded margins; note notch in margin - this is the attac...

Contact Information

CSD Facility

116 Church Street NE, Minneapolis, MN 55455

P: 612-626-7889

Connect on Social Media