関連する実験動画
Updated: Jul 18, 2026

10:30
Administering and Detecting Protein Marks on Arthropods for Dispersal Research
Published on: January 28, 2016
アルゼンチンのパンパで,テクタイトが散らばっている可能性のある地
P A Bland1, C R de Souza Filho, A J T Jull
1Planetary and Space Sciences Research Institute, The Open University, Milton Keynes MK7 6AA, UK. p.a.bland@open.ac.uk
まとめ
研究者らは,アルゼンチンのガラスの断片を調査し,当初は衝撃で放出されたものと考えられていた. 新しい発見は,ガラスはテクトイトであり,おそらく0.48百万年前の衝撃イベントから,新しい散らばったフィールドを作成することを示唆しています.
科学分野:
- 地質学 地質学 地質学
- 地質物理学 地質物理学とは地質物理学です.
- 惑星科学 惑星科学
背景:
- アルゼンチンのパンペアン平原の長い低谷は,以前は衝突の証拠として解釈されていました.
- 関連する衝撃ガラスは,非常に斜めの衝撃から近接噴出物を示唆しました.
研究 の 目的:
- パンペア平原における長方形の特徴と関連するガラスの起源を再評価する.
- ガラスの破片が衝突で放出された物か,テクタイトなのかを判別する.
主な方法:
- 地質的地図作成により,長方形の特徴を特定し,特徴づけます.
- ガラスの断片のジオクロノロジック年代測定.
- グラスエイジと構成を,既知のテクタイトに散らばったフィールドと比較する.
主要な成果:
- 約400の追加の長方形の特徴が特定され,衝撃ではなく,エオリアン (風に吹かれた) 起源の特徴を示した.
- リオ・クアルトの沈殿地からのガラスの断片の年代測定は,800km離れたところで見つかったガラスの年齢と一致しました.
- ガラスはおそらくテクタイト材料で,約0.48百万年前に大きな衝突が起こったことを示唆しています.
結論:
- 長方形の低谷は主にエオリア起源である.
- ガラスの断片はテクトイトであり,局所衝突による近接噴出物ではない.
- この発見は,南半球に新しいテクトイトが散らばった地盤が発見されたことを示すもので,これは約0.48万年前の衝突事件に関連している.
関連する概念動画
Distribution and Dispersion
Ecology is the study of how organisms interact with their environment and with one another. An important aspect of ecology is understanding where species are found and how individuals are distributed within those areas. The geographic range of a species refers to the total area where its members are located, while dispersion describes the pattern of spacing of individuals within that range.Geographic Range and Dispersion PatternsWithin a species’ geographic range, individuals may be distributed...
Habitat Fragmentation
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
Quarrying of Stone
Quarrying is the process of extracting stone from a quarry, where specialized techniques are employed to remove large blocks of stone safely and efficiently. This process can involve controlled explosions or more precision-oriented methods such as cutting and drilling.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
One common method involves using a diamond belt saw to cut large blocks from the quarry face. These blocks can be about 50 feet long and 12 feet high. After the initial vertical cut, drilling is performed at the base of the block.
Porosity and Absorption of Aggregate
Aggregates contain pores of varying sizes; while some are completely enclosed within the particles, others open onto the surface, allowing water to penetrate. The porosity of aggregates is a major factor contributing to the overall porosity of concrete, given that aggregates constitute about three-quarters of concrete's volume.
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
When all pores in an aggregate are filled with water, the aggregate is considered saturated and surface-dry. If left in dry air, water will evaporate until the aggregate...
Microbial Leaching
Microbial leaching, also known as bioleaching, is an environmentally favorable method for extracting metals from low-grade ores using specific microorganisms. This biotechnological approach is particularly valuable for mining operations targeting copper, gold, and uranium, where traditional extraction methods may be economically or environmentally impractical.Copper Leaching and Microbial CatalysisIn copper bioleaching, crushed ore is arranged into heaps and irrigated with a dilute sulfuric...

