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from article Regolith
Diagram showing the components of residual regolith.
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from article Climate history
Plot of the average temperature for the contiguous United States during the month of August from 1895 to 2016. (Credit: NOAA)
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from article Climate history
Global temperature relative to peak Holocene temperature, based on ocean cores. (Credit: NASA)
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from article Weathering processes
Exchange-energy relationships between a rootlet and three minerals. (a) A potassium-bearing, primary silicate mineral. (b) A clay mineral well stocked with exchangeable metal cations. (c) A clay mineral scantily stocked with metal cations. The…
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from article Weathering processes
Comparison of binding energy (calories per gram-equivalent weight) on nutrient metal cation (indicated by M) by rocks and soil minerals with exchange binding energy on cation by plant roots. The relation of plant nutrition to weathering and…
Image
from article Prehnite
Prehnite in reniform aggregates, Paterson, New Jersey. (Specimen from Department of Geology, Bryn Mawr College)
Image
from article Hepaticopsida
Jungermanniidae, the leafy liverworts. (a) Herberta, showing three ranks of equal bifid leaves. (b) Lepidozia, ventral aspect, showing reduced ventral leaves. (c) Leucole jeunea, ventral aspect, showing reduced ventral leaves and complicate dorsal…
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from article Hepaticopsida
Diagram of life cycle of the liverwort Marchantia, indicating stages at which chromosome changes occur. (After H. J. Fuller, The Plant World, rev. ed., Holt, 1951)
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from article Hepaticopsida
Transverse sections through the thallus of Marchantia. (a) Middle portion with scales and rhizoids on the underside. (b) Margin of the thallus more highly magnified. (After H. Kraemer, Applied and Economic Botany, 2d ed., Wiley, 1916)
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from article Hepaticopsida
Marchantia. (a) Example of male gametophyte (antheridial plant) (after H. J. Fuller and O. Tippo, College Botany, Holt, 1949). (b) Section through an antheridial receptacle (after W. J. Robbins and H. W. Rickett, Botany, 3d ed., Van Nostrand, 1939).
