E. Harper

Publications62
h-index27
Citations2,704
Highly Influential Citations97
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Criticality of metals and metalloids
Significance In the past decade, sporadic shortages of metals and metalloids crucial to modern technology have inspired attempts to determine the relative “criticality” of various materials as a… Expand
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Taphonomy and the Mesozoic marine revolution; preservation state masks the importance of boring predators
Exceptionally neomorphosed bivalves from a range of Jurassic sediments from England and North Ireland have been discovered to bear neat, circular, straight-sided boreholes over a millimeter in… Expand
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  • 7
On the materials basis of modern society
Significance Modern life is enabled by the use of materials in its technologies. Over time, these technologies have used a larger and more diverse array of materials. Elemental life cycle analyses… Expand
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Are calcitic layers an effective adaptation against shell dissolution in the Bivalvia
Conventional wisdom, based on properties of reagent-grade salts, states that organisms which construct their exoskeletons from calcite rather than aragonite have a greater ability to resist… Expand
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Criticality of the geological copper family.
Because modern technology depends on reliable supplies of a wide variety of materials, and because of increasing concern about those supplies, a comprehensive methodology has been created to quantify… Expand
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Assessing the importance of drilling predation over the Palaeozoic and Mesozoic
Abstract Plausible predatory Palaeozoic and Mesozoic drillholes have been reported in the literature from 62 localities, mainly from North America and Western Europe, most of which were discovered in… Expand
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By-product metals are technologically essential but have problematic supply
TLDR
Metals that are obtained largely or entirely as by-product of one or more host metals from geologic ores are essential to modern technology, but their supplies may be constrained due to a variety of factors. Expand
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Patterns of shell repair in articulate brachiopods indicate size constitutes a refuge from predation
The cost of overcoming prey defenses relative to the value of internal tissues is a key criterion in predator/prey interactions. Optimal foraging theory predicts: (1) specific sizes of prey will… Expand
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Are conchiolin sheets in corbulid bivalves primarily defensive
  • 37
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Metal lost and found: dissipative uses and releases of copper in the United States 1975-2000.
Metals are used in a variety of ways, many of which lead to dissipative releases to the environment. Such releases are relevant from both a resource use and an environmental impact perspective. We… Expand
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