
alaan aar. hildebrand

ellen russell hildebrand (janm 1955) ack grah vaigyaanik aur kailgari vishvavidyalaya mein bhoovigyaan vibhaag mein sahayogi professor hain. unhone kshudragrah prabhaav cratering, fireball aur ulkapind punarpraapti key adhyayan mein visheshagyata praapt kii haye. unake kaam ney cretaceous avadhi key anta mein chikaksulab kshudragrah key kaaran vilupt honey kii ghatana parr prakaash daala haye. hildebrand prayeri ulkapind network khoj pariyojana key netaaon mein seey ack haye.
shiksha aur currier.
hildebrand koo bee milaa.aiss. 1977 mein nyu brunswick vishvavidyalaya mein bhoovigyaan mein. unhone ph. dee. kii.dee. 1992 mein villium boynton key tahat arizona vishvavidyalaya mein grah vigyaan mein shodh prabandh "bhoo-rasayan vigyaan aur cretaceous/tritiyak seema prabhaav ejecta kii stareekaran" key saath.
1978 mein mexico key yukatan praaydweep mein chikaksulab crater kii khoj glain penfield dwara kii gaee thee, lekin usa samay isake mahatva koo pahachaana naheen gayaa thaa. 1990 mein, apane doctorate karyakram key hisse key roop mein, hildebrand ney, luis aur walter alvaarez key pitaa-putra dall key saath kaam karate hue, vivadaspad lekh prakaashit kiye, jisamen sujhaav diyaa gayaa kii ack kshudragrah seey ack badey prabhaav ney cretaceous avadhi key anta mein badey paimaane parr vilupt honey kaa kaaran banaa. prabhaav sthal antatah chikaksulab mein honey key liye nirdhaarit kiya gayaa thaa aur isake kaaran vilupt honey koo key-tii ghatana key roop mein jaanaa jaane lagaa.
hildebrand kanada key bhoogarbhiya sarvekshan kaa hissa haye, joe mukhya roop seey key-tii ghatana parr dhyaan kendrit kartaa haye.
baahari link.
 

