Origin and diagenesis of K/T impact spherules - from Haiti to Wyoming and beyond
Meteoritics
By: B.F. Bohor and B.P. Glass
Links
- The Publications Warehouse does not have links to digital versions of this publication at this time
- Download citation as: RIS | Dublin Core
Abstract
Impact spherules in Cretaceous/Tertiary (K/T) boundary clays and claystones consist of two types; each type is confined to its own separate layer of the boundary couplet in the Western Hemisphere. The form and composition of each of the spherule types result from its own unique mode of origin during the K/T event. Type 1 splash-form spherules occur only in the melt-ejecta (basal) layer of the K/T couplet. This layer was deposited from a ballistic ejecta curtain composed of melt-glass droplets transported mostly within the atmosphere. In contrast, Type 2 spherules are accreted, partially crystalline, spheroidal bodies that formed by condensation of vaporized bolide and target-rock materials in an expanding fireball cloud, from which they settled out of buoyant suspension to form the fireball layer. Dendritic and skeletal Ni-rich spinel crystals are unique to these Type 2 spherules in the fireball layer. -from Authors
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Origin and diagenesis of K/T impact spherules - from Haiti to Wyoming and beyond |
| Series title | Meteoritics |
| Volume | 30 |
| Issue | 2 |
| Year Published | 1995 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Meteoritics |
| First page | 182 |
| Last page | 198 |
| Google Analytic Metrics | Metrics page |