logging in Bulk logged recovery VS Full recovery model
I finally found the answer Red gate transaction log management book by Tony and Gail shaw.

Below is the Snip for a select into operation done in full recovery model:



From the above snip we can see all the operations done to sometable are logged under the context of lop_format_page and logrecordlength is also 8276 bytes which indicates SQl eventhough under full recovery model,doesnt log each and every row,rather it logs entire image of the page plus log headers.

Below is the Snip for the same operation done in Bulk logged recovery model:


From the above Snip,we can see now there is no record indicating LOP_FORMAT_PAGE,rather Sql is now tracking only page allocations and extent allocations,plus some internal system table changes,but no data pages are present in the log.

Thanks to redgate for the amazing Book