まとめ
アルゼンチンの南部の氷河は極東に広がり,溶岩の流れの間の床まで積もった. 最古のティルは320万年前のもので,最古のティルは170万年前のものです.
科学分野:
- 地質学 地質学 地質学
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 火山学 火山学とは
背景:
- アルゼンチン南部の地質学記録は,過去の氷河活動の証拠を明らかにしています.
- 交差した溶岩流とティルの堆積物は,地域の環境史の洞察を提供します.
研究 の 目的:
- アルゼンチンの南部の氷河期に遡る.
- この地域における過去の氷河期イベントの範囲とタイミングを再構築する.
主な方法:
- 岩床と交差した溶岩流の地質学的な地図作成.
- 田舎の堆積物に関連した火山層の放射線年代測定.
主要な成果:
- 氷床は現在のコルディレラ山脈の頂上から少なくとも40km東に広がる氷によって積もられた.
- 最古の床を封じる溶岩流は,約320万年±100万年前のものである.
- 最新のタールベッドは,約170万年±50万年前のラバ流で覆われています.
結論:
- 氷河氷河は,プレオセーヌ・プレイストセーヌ時代にアルゼンチン南部の東方に著しく進んだ.
- 溶岩の流れの年代測定は,この地域の氷河イベントの時間的枠組みを提供します.
関連する概念動画
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01:21Isothermal Processes
A thermodynamic process that occurs at constant temperature is called an isothermal process. Heat slowly flows into the system or out of the system to maintain thermal equilibrium. Processes involving phase changes like water evaporation into steam or freezing water into ice at a constant temperature are examples of Isothermal Processes.
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An ideal gas can also undergo isothermal expansion or compression.
For example, consider 1 mole of an ideal gas inside an isolated cylinder at initial volume V...