• 검색 결과가 없습니다.

IEG 환경지질연구정보센터

N/A
N/A
Protected

Academic year: 2021

Share "IEG 환경지질연구정보센터"

Copied!
1
0
0

로드 중.... (전체 텍스트 보기)

전체 글

(1)

10월

26일(수)․층서퇴적학│석유지질학

2011 추계지질과학연합학술발표회 초록집 25

Updip migrating bedforms in an inclined heterolithic stratification, Upper Cretaceous Neslen Formation, Utah, USA

Kyungsik Choi

1,*

․Ron Steel

2

․Cornel Olariu

2

1

Faculty of Earth Systems and Environmental Sciences, Chonnam National University, [email protected]

2

Jackson School of Geosciences, Univeristy of Texas, Austin

Upper Cretaceous Neslen Formation in the Book Cliffs of Utah, USA, contains multiple stack- ings of inclined heterolithic stratification (IHS), which were deposited in tidal-fluvial channels.

The IHS consists of alternation of rippled to cross-bedded sandstones and laminated siltstones, dipping at varying angles from 2 to 5

o

. Bedforms are mostly current ripples and occasionally dunes that migrate obliquely to the updip direction of the master bedding of the IHS. Changing dip angles of the IHS may result from the lateral migration of point bars in a tidal-fluvial channel.

Observations from modern estuarine macrotidal environment (Gomso Bay, Korea) indicate that such counterintuitive relations of dip angles between bedforms and masterbedding of IHS are due to the mutually evasive tidal current pattern within a channel rather than the backflows of currents at meander bend. The presence of updip migrating bedforms within IHS can be regarded as a compelling evidence of a sinuous, meandering tidal-fluvial channel.

The architecture of IHS seems to be governed by several factors including (1) channel sinuosity, (2) meander-bend migration pattern, (3) tidal asymmetry, (4) relative position within tidal frame, and (5) relative position within proximal-distal trend.

구두 2-12

참조

관련 문서

This book contains hundreds of complete, working examples illustrating many common Java programming tasks using the core, enterprise, and foun- dation classes APIs.. Java Examples

The index is calculated with the latest 5-year auction data of 400 selected Classic, Modern, and Contemporary Chinese painting artists from major auction houses..

It considers the energy use of the different components that are involved in the distribution and viewing of video content: data centres and content delivery networks

After first field tests, we expect electric passenger drones or eVTOL aircraft (short for electric vertical take-off and landing) to start providing commercial mobility

1 John Owen, Justification by Faith Alone, in The Works of John Owen, ed. John Bolt, trans. Scott Clark, "Do This and Live: Christ's Active Obedience as the

There was a significant increase in new bone formation in the group in which toothash and plaster of Paris and either PRP or fibrin sealants were used, compared with the groups

The effects of the acceleration voltage, the probe current and the travel speed on the formation, the ingredient variation and the surface roughness of the deposited

Program counter, index register, accumulators and condition code registers are stored in the stack Further interrupts are disabled. Processor jumps to memory location address